Data Is or Data Are
You may see both forms in books, reports, websites, research papers, and everyday conversations. So, which one should you use?
The answer depends on how you are treating the word “data.” Traditionally, data is the plural form of datum.
Under this traditional rule, data are is correct because a plural subject takes a plural verb.
For example:
The data are accurate.
However, modern English often treats data as a mass noun, much like information.
In general writing, business, technology, and everyday speech, data is is now very common.
For example:
The data is stored on a secure server.
This does not mean that one form is always right and the other is always wrong.
Both forms can be correct, but they belong to slightly different styles and ways of thinking about the word.
The important thing is to understand the context. A scientific paper may prefer data are, while a technology company may naturally write data is.
By the end of this guide, you will know when to use data is, when to use data are, why both forms exist, and how to choose the form that sounds natural and appropriate for your situation.
What Does “Data Is” Mean?
“Data is” treats data as a singular or uncountable mass noun. In this use, data means a collection or body of information viewed as one thing.
This use is very common in modern English.
Think about the word information. We normally say:
Data Is or Data Are
We do not normally say:
Data Is or Data Are
When speakers treat data in a similar way, they use is:
The data is useful.
This is especially common in technology, business, media, and ordinary conversation.
When Should You Use “Data Is”?
Use data is when you are treating data as one body, collection, or source of information.
For example:
Data Is or Data Are
Here, the speaker is thinking about the collected information as one resource.
You might also hear:
Data Is or Data Are
The speaker is not thinking about each individual piece of information. The focus is on the entire collection.
This singular use has become especially common in modern technical English.
Grammar Rule for “Data Is”
When data is treated as a singular mass noun, it takes a singular verb:
Data + is + singular complement
Examples:
The data is reliable.
The data is incomplete.
The data is ready for analysis.
The data is stored on the server.
The same pattern appears with other singular mass nouns:
Data Is or Data Are
Research is necessary.
Evidence is useful.
Data is valuable.
Examples of “Data Is”
Here are several natural examples:
- Data Is or Data Are
- The data is available to all team members.
- The data is not complete yet.
- The data is useful for making business decisions.
- The data is updated every morning.
- The data is difficult to interpret without context.
- Data Is or Data Are
- The data is protected by a password.
Notice that the verb is is in every sentence.
Is “Data Is” Grammatically Correct?
Yes. Data is can be grammatically correct in modern English.
This is important because many learners are taught a simple rule:
Data Is or Data Are
That rule describes the traditional grammatical treatment of data, but it does not fully describe modern English.
Many modern dictionaries and style discussions recognize data as being used both as a plural noun and as a mass noun. The singular use is particularly common outside highly formal scientific writing.
So, do not automatically mark every sentence containing data is as wrong.
Instead, ask:
Is the writer treating data as a collection of information or as individual data points?
That question will help you choose the right verb.
What Does “Data Are” Mean?
“Data are” treats data as a plural noun.
This follows the traditional rule of English grammar.
The word data comes from Latin. In traditional usage, datum is singular and data is plural.
So:
- one datum
- two data
- Data Is or Data Are
Under this traditional system, the plural verb are is used.
When Should You Use “Data Are”?
Use data are when you are following a formal or traditional style, especially when individual measurements, facts, observations, or data points are being discussed.
It is common in:
- scientific writing
- academic research
- formal reports
- statistics
- technical papers
- some government and professional writing
For example:
Data Is or Data Are
The writer is treating the results as a collection of individual observations.
Another example is:
The data are divided into three groups.
Here, the plural verb fits the traditional plural treatment of data.
Grammar Rule for “Data Are”
When data is treated as plural, use a plural verb:
Data + are + plural complement
Examples:
The data are accurate.
Data Is or Data Are
The data are available.
The data are surprising.
The data are consistent with our findings.
This is similar to other clearly plural nouns:
The results are accurate.
Data Is or Data Are
The findings are important.
Examples of “Data Are”
Here are eight examples:
- The data are accurate and reliable.
- The data are collected from several sources.
- The data are consistent with our earlier findings.
- The data are divided into four groups.
- The data are available for further analysis.
- The data are presented in the table below.
- The data are based on interviews with 500 students.
- The data are not sufficient to support this conclusion.
These sentences sound especially natural in formal academic or scientific writing.
Is “Data Are” Always Better?
No.
Data are is not automatically better simply because it follows the older plural rule.
If you are writing a research paper for a journal that follows traditional scientific style, data are may be the safer choice.
But if you are writing a general website, software guide, business report, or everyday message, data is may sound more natural.
The key is consistency and context.
Difference Between “Data Is” and “Data Are”
The main difference is how the noun data is being treated.
Data is treats data as a singular mass noun.
Data are treats data as a plural noun.
Neither form should be judged without considering the context.
| Expression | Treatment of “data” | Common use | Example |
|---|---|---|---|
| Data is | Singular/mass noun | General, business, technology | The data is useful. |
| Data are | Plural noun | Academic, scientific, formal | The data are useful. |
| A datum is | Singular count noun | Technical/traditional | One datum is missing. |
| Data points are | Clearly plural | Specific measurements | The data points are accurate. |
1. Meaning
In many modern sentences, both forms refer to the same general thing: information or collected facts.
Compare:
Data Is or Data Are
and:
The data are reliable.
The basic meaning is almost the same.
The difference is mainly grammatical treatment and style.
The first sentence views the data as one body of information.
The second views the data as a plural collection of individual pieces or observations.
2. Formality
Data Is or Data Are
For example:
The data are consistent with the hypothesis.
This fits naturally into an academic research paper.
Data is sounds more conversational and modern:
Data Is or Data Are
You are likely to hear this form in everyday professional communication.
3. Scientific Writing
Scientific writing often uses data are, particularly when the writer is discussing individual observations or measurements.
For example:
The data are statistically significant.
However, style varies by field and publication. Some scientific and medical organizations now use data as a singular mass noun.
Therefore, always check the style guide of the journal, university, employer, or publication if you have a specific requirement.
4. Technology and Business
In technology and business writing, data is is extremely common.
For example:
Customer data is stored securely.
The data is transferred automatically.
Data Is or Data Are
Here, data behaves much like information.
It is difficult to imagine the speaker counting each individual piece of information. The focus is on the whole collection.
5. Sentence Structure
The verb must agree with the way data is being treated.
With singular treatment:
Data Is or Data Are
With plural treatment:
The data are useful.
You can also avoid the issue by using a clearer plural noun:
The data points are useful.
Or:
Data Is or Data Are
This can be helpful when writing for a mixed audience.
6. Meaning of “Data” Can Change With Context
Consider these two sentences:
Data Is or Data Are
The data are divided into five categories.
The first sentence naturally presents data as one stored collection.
The second focuses more on the data as separate groups or observations.
This difference is subtle. You do not always need to make a deep philosophical decision about the noun. In many cases, style and convention determine the choice.
Grammar Rules You Must Remember
Rule #1: “Data” Can Be Singular or Plural in Modern English
This is the most important rule.
Modern English allows data to function as either a plural noun or a mass noun.
Therefore:
Data Is or Data Are
can be correct.
And:
Data Is or Data Are
can also be correct.
The choice depends on context, style, and the writer’s treatment of the noun.
Rule #2: Use “Are” When You Treat “Data” as Plural
If you are following traditional grammar, remember:
datum = singular
data = plural
So:
Data Is or Data Are
The data are unusual.
This treatment is especially common in formal scientific and academic writing.
For example:
The data are based on 1,000 observations.
The plural verb are agrees with the plural noun data.
Rule #3: Use “Is” When “Data” Acts Like a Mass Noun
When data means a general body or collection of information, singular is is often natural.
For example:
Data Is or Data Are
The sentence treats the whole collection as one thing.
This is common in technology and business English.
Another example:
The data is useful for planning.
Here, the focus is not on individual pieces of information. It is on the data as a resource.
Rule #4: Follow the Style of Your Audience
If you are writing for school, university, science, or a professional publication, check the preferred style.
Some organizations prefer:
The data are…
Others accept or prefer:
Data Is or Data Are
Do not change randomly between the two forms in the same document.
If your chosen style treats data as singular, remain consistent.
If your style treats it as plural, remain consistent.
Consistency makes your writing look careful and professional.
Common Mistakes Students Make
Many learners make mistakes with this topic because they learn one simple rule and then try to use it everywhere.
Mistake 1: Thinking “Data Is” Is Always Wrong
Some students learn:
Data Is or Data Are
Then they see:
The data is useful.
and immediately think the sentence must be incorrect.
That is too strict for modern English.
Better approach: Look at the context and style.
In general modern writing, data can be a mass noun.
Data Is or Data Are
This is widely used and acceptable.
Mistake 2: Thinking “Data Are” Is Always Wrong
The opposite mistake also happens.
A learner may think:
“Data” means information, so it must always take “is.”
But data are remains correct and important, especially in traditional academic and scientific usage.
For example:
The data are presented in Figure 2.
This is perfectly grammatical.
Mistake 3: Using “Data Is” and “Data Are” Randomly
A document can become inconsistent like this:
The data is collected every month. The data are analyzed by our team. The data is stored securely.
The reader may wonder why the grammar keeps changing.
Sometimes there is a genuine reason to switch, but usually there is not.
Correction tip: Choose the style that fits your audience and stay consistent.
Mistake 4: Saying “Datas”
A very common learner error is:
We collected many datas.
This is normally incorrect.
In standard English, data itself can be plural or a mass noun, so you do not normally add -s to make datas.
Instead, say:
Data Is or Data Are
Or:
We collected several sets of data.
You can also say:
We collected several data points.
Mistake 5: Confusing “Data” With “Datum”
In traditional technical usage:
datum = one piece of data
data = more than one datum
For example:
Data Is or Data Are
These data are unusual.
However, datum is not common in everyday English. Most people simply say:
This piece of data is unusual.
That sounds much more natural in ordinary conversation.
Mistake 6: Changing the Verb Without Changing the Meaning
A learner may assume that are always sounds more intelligent or formal.
That is not true.
For example:
Data Is or Data Are
is fine.
But:
The data is available online.
is also natural in many modern contexts.
Good grammar is not about choosing the form that sounds more complicated. It is about choosing the form that fits the context.
Easy Trick to Remember the Difference
Here is a simple trick.
Think of data as a box of information.
If you see the whole box as one collection, use:
Data Is or Data Are
If you are thinking about the individual pieces inside the box, or you are following a traditional plural style, use:
Data Is or Data Are
For example:
The data is stored on my computer.
Imagine one big collection sitting on your computer.
But:
The data are divided into three groups.
Now you are thinking about the individual results or groups within that collection.
Another Easy Trick
Replace data with information.
If the sentence still makes sense with information, singular is may sound natural:
The information is useful.
So:
Data Is or Data Are
Now try replacing data with results.
If you are talking about separate findings, plural are may fit:
The results are useful.
So:
The data are useful.
This is not an absolute rule, but it is a useful guide for learners.
The One-Sentence Memory Rule
Remember:
Data Is or Data Are
“Data are” = data viewed as plural or individual findings.
And remember one more thing:
Formal style may prefer “data are,” while modern general English often uses “data is.”
Daily Life Examples
Here are some natural examples that you may hear or use in real situations.
1. At Work
A: Do we have the sales numbers?
B: Yes. The data is in the shared folder.
Here, data means one collection of information.
2. In a Research Meeting
A: What did the study find?
B: The data are consistent with our original results.
The formal research context makes data are a natural choice.
3. In Technology
The data is automatically backed up every night.
This is a very natural modern usage.
4. In a School Project
The data are shown in the table below.
A student writing a formal report may choose the traditional plural form.
5. In Business
Data Is or Data Are
Here, data is viewed as a general body of customer information.
6. During a Presentation
The data are interesting, but we need more evidence.
This sounds natural in a formal presentation, especially when discussing research results.
7. In Everyday Conversation
A: How do you know the product is popular?
B: The data is pretty clear.
In casual speech, data is is very common.
8. In a Science Class
The data are recorded after each experiment.
A science teacher may prefer data are, particularly when referring to several measurements.
9. In Software Development
The data is sent to the server every five minutes.
This is a common technical-English pattern.
10. In a Report
The data are based on responses from 2,000 participants.
This formal sentence uses the traditional plural form.
Practice Section
Choose is or are in each sentence.
1. The data ___ stored on a secure server.
Answer: is
Here, data is treated as one collection of information.
2. The data ___ presented in the research paper.
Answer: are
This is a formal academic context where the traditional plural form is appropriate.
3. Customer data ___ valuable to modern businesses.
Answer: is
The phrase customer data is commonly treated as a mass noun.
4. The data ___ consistent with the previous experiment.
Answer: are
This sentence fits a formal scientific style in which data is treated as plural.
5. The data ___ updated automatically every day.
Answer: is
Here, the data is viewed as one collection or resource.
Quick Score Guide
If you got all five correct, excellent work.
If you made a mistake, do not worry. The important thing is not memorizing one answer for every sentence. You need to notice the context and the style.
FAQs
1. Is “data is” grammatically correct?
Yes. Data is is grammatically acceptable in modern English when data is treated as a singular mass noun.
It is especially common in general, business, technology, and everyday writing.
Data Is or Data Are
2. Is “data are” grammatically correct?
Yes. Data are is traditionally correct because data is the plural form of the Latin-derived noun datum.
It remains common in academic, scientific, and formal writing.
If your school, journal, or organization follows traditional scientific grammar, data are may be preferred.
3. Should I say “the data is” or “the data are”?
Both can be correct.
Use the data is when treating data as one body of information.
Data Is or Data Are
For important academic work, check the style guide you have been asked to follow.
4. Is “data” singular or plural?
It can be either, depending on usage.
Traditionally, data is plural and datum is singular.
In modern English, data is also widely used as a mass noun, which allows singular verbs such as is.
This is why both forms appear in real English.
5. Can I say “data was”?
Yes, when data is being treated as a singular mass noun.
For example:
The data was collected last year.
This is common in modern general English.
If you are following a traditional style that treats data as plural, you would write:
Data Is or Data Are
6. Is “data is” formal or informal?
It can appear in both formal and informal writing, but its use is especially common in modern general and professional English.
Data are may sound more formal or traditional in academic and scientific contexts.
Still, formality alone does not determine the correct choice. The style of the field matters too.
7. Is “data” the same as “information”?
Not exactly, but they are closely related.
Information is normally an uncountable noun:
The information is useful.
Data can be treated in the same way in modern English:
Data Is or Data Are
But data can also retain its traditional plural use:
The data are useful.
That is why this word causes more grammar confusion than information.
8. Should I use “datas” for more than one set of information?
Usually, no.
Do not normally write:
We collected three datas.
Instead, use:
We collected three sets of data.
You can also say:
We collected three datasets.
or:
We collected several groups of data.
Data does not normally need -s to show plurality.
9. Which form is better for academic writing: “data is” or “data are”?
There is no universal answer.
Many traditional academic and scientific styles prefer data are, especially when the word refers to individual observations or results.
However, some modern publications and fields accept or prefer singular data is.
Always follow the style guide of your university, journal, professor, or organization.
10. Can I use both “data is” and “data are” in the same article?
You can, but you should have a clear reason.
Unnecessary switching can make your writing look inconsistent.
If you choose to treat data as a singular mass noun throughout a general article, keep using is.
If you are writing in a traditional scientific style, consistently use are unless the style guide says otherwise.
Conclusion
Data Is or Data Are
Traditionally, data is the plural of datum, so data are follows the older grammatical rule. This form remains common in scientific, academic, and formal writing.
Modern English, however, often treats data as a mass noun, especially when it means a body or collection of information.
In that use, data is is completely natural and widely used in business, technology, journalism, and everyday English.
The best choice depends on context, meaning, and style.
If you are writing a scientific paper, check the required style before choosing. If you are writing general English, data is will often sound natural.
If you are treating data as plural observations or following a traditional style, data are is a good choice.
Most importantly, do not be afraid of this word. Once you understand that English allows both treatments, the confusion becomes much easier to handle.
