Is Islam and Muslim the Same?

Short answer

• No. Islam and Muslim are not the same, although they are closely related. Islam is the religion. A Muslim is a person who follows Islam. The two words come from the same Arabic root, but they do different jobs in a sentence: you practice Islam, and you are a Muslim. A third word, Islamic, is the adjective used for things connected with the religion, such as Islamic art or Islamic history. This article explains only that terminology distinction. For a full guide to what the religion teaches, see the companion guide titled What Is Islam?

By Emma Hudson

People often use Islam and Muslim as if they were interchangeable. Search results for this question are full of short answers that say the same thing in one line, and the confusion is understandable: the words look alike, sound alike, and always appear together. But the distinction matters, because getting it wrong produces sentences that do not mean what the writer intended, such as “the Muslim religion” or “Islam people.” This article works through the difference step by step: what each word means, where each word comes from, how to use each word correctly, and which related words are not synonyms at all.

The difference in one table

Word	What it names	Part of speech	Example sentence
Islam	The religion itself	Noun	“She converted to Islam.”
Muslim	A person who follows Islam	Noun, and also an adjective	“He is a Muslim.” / “A Muslim family moved in next door.”
Islamic	Anything connected with Islam	Adjective only	“Islamic art,” “Islamic history,” “Islamic law”

The table is the whole answer in miniature. Everything that follows explains why the table looks that way, and how to avoid the errors that come from mixing the rows up.

Where the words come from

Both words come from Arabic, and both come from the same three-letter root, s-l-m. Encyclopaedia Britannica renders the Arabic term islam literally as “surrender,” and the Hartford Institute’s academic overview of Islam gives the meaning as “submission (to God).” The difference between those two English renderings is a matter of translation choice, not a disagreement about the Arabic: the word names an act of giving oneself over to the will of God.

Muslim is built from the same root, but it is a different grammatical form. Britannica explains that the believer is “called a Muslim,” the word being the active participle of islam, and the Hartford overview puts it the same way: “One who submits is a muslim, from the same root as Islam.” In other words, Islam names the act, and Muslim names the person doing it. The pattern is ordinary Arabic grammar: a verbal noun for the action, and an active participle for the doer. English has rough parallels, though none is exact. A person who teaches does teaching, and a person who preaches does preaching, but in those cases the person and the activity get different words. Arabic packs the relationship into a single root, which is why the two English words look like twins.

A third word from the same root is salam, which means “peace.” The Hartford overview notes that salam is a Semitic cognate of the Hebrew shalom. That shared root explains why many English-language explanations say that Islam is “a religion of peace,” but it does not make Islam and peace synonyms, and it does not make Muslim and peace synonyms either. Words that share a root share a history, not a meaning.

The Quranic link between the word and the religion is explicit in the text Muslims regard as scripture. The Quranic Arabic Corpus records that the concept of Islam appears in verse 3:19, which the Sahih International translation renders: “Indeed, the religion in the sight of Allah is Islam.” That verse is one reason the exact phrase “Islam is the religion” appears so often in English-language searches. In Islamic understanding, the word is also applied to figures who lived long before the Prophet Muhammad, including Abraham, whom Quran 3:67 describes as a Muslim, because in that understanding every prophet called people to the same submission to the one God. That is a statement of Islamic doctrine, presented here as Muslims understand it, and it helps explain why the word Muslim can appear in Islamic writing about people who lived centuries before the religion took its historical form in seventh-century Arabia.

How to use each word correctly

Islam: the religion

Use Islam whenever you mean the religion, the faith system, or the body of teaching. “Islam teaches,” “the history of Islam,” and “she converted to Islam” are all correct. One point of care: phrases such as “Islam says” are shorthand. Strictly, a religion does not speak; its texts and its scholars do. Careful writing prefers “Islamic teaching holds” or “Muslims believe,” with the belief attributed to the people who hold it. That habit also keeps the article honest about whose claim is being reported, which matters on a topic where doctrine is easily mistaken for settled fact.

Muslim: the person

Use Muslim whenever you mean a person, or people, who follow Islam. As a noun it takes an article: “a Muslim,” “the Muslims of the city.” As an adjective it goes before a noun that refers to people: “Muslim communities,” “a Muslim colleague,” “Muslim voters.” In both uses it is capitalized, because it names membership in a religious community, in the same way that Christian and Jewish are capitalized.

One common error is to use Muslim where the religion is meant. “He follows Muslim” is wrong; “He follows Islam” is right. “The Muslim faith” is a borderline case: it is widely used and widely understood, but “the Islamic faith” or simply “Islam” is cleaner, because the faith belongs to the religion, not to the person.

Muslimah: the feminine form

Arabic marks gender on nouns, so the feminine form of Muslim is Muslimah, also transliterated Muslima, meaning a Muslim woman. In English, “a Muslim woman” is the ordinary phrasing, and Muslimah is used less often, but it is the correct feminine form and it appears in English writing about Muslim women. The plural follows the same pattern: Muslim men and women together are Muslims.

Islamic: the adjective

Use Islamic for things, ideas, institutions, and periods connected with Islam: Islamic art, Islamic law, Islamic history, the Islamic calendar. Do not use it for people. “An Islamic man” is wrong; “a Muslim man” is right. Do not use it as a noun for the religion either: “He converted to Islamic” is wrong; “He converted to Islam” is right.

A quick test covers most cases. If you can put a person in the sentence (“a ,” “the ___ community”), the word is usually Muslim. If you can put a thing, a subject, or an institution in the sentence (” art,” ”___ history,” ”___ law”), the word is usually Islamic. If you mean the religion itself, the word is Islam.

Common mistakes, corrected

What people write	Why it is wrong	What to write instead
“The Muslim religion”	Muslim names a person, not a religion	“Islam,” or “the Islamic religion”
“Islam people”	Islam names the religion, not its followers	“Muslims,” or “Muslim people”
“He follows Muslim”	A person cannot follow a person-word in this sense	“He follows Islam”
“An Islamic man”	Islamic is an adjective for things, not people	“A Muslim man”
“She converted to Islamic”	Islamic is an adjective, not the name of the faith	“She converted to Islam”
“The Islamic people”	The people are Muslims; Islamic describes things	“The Muslim people,” or “Muslims”
“Muslim is a religion”	Muslim names the follower, not the faith	“Islam is a religion; a Muslim is its follower”

None of these errors is a moral failing, and most readers will understand what was meant. But on a reference site, precision is the product, and the table above is the cheapest way to buy it.

Related words that are not synonyms

Islamist

Islamist is not another word for Muslim, and the distinction is important. The Hartford Institute’s overview notes that “Islamist” is a term preferred by Muslims to “fundamentalist” for movements that hold that the Quran and the Prophet’s Sunna, his example, should be the ultimate authorities in the challenge of living life Islamically. In ordinary usage, an Islamist is someone who advocates a political program built on Islamic principles. Most Muslims are not Islamists in that sense, and most uses of the word Muslim say nothing about a person’s politics. Treating the two words as interchangeable therefore misdescribes both the religion and the politics.

The Muslim world and the Islamic world

These two phrases overlap, and neither names a formal organization or a country. Writers often use “the Muslim world” when the emphasis is on people and populations, and “the Islamic world” when the emphasis is on civilization, history, and culture. Encyclopaedia Britannica, for example, uses “Islamic world” for its coverage of the peoples who embraced Islam and their history. Either phrase is loose, and careful writing prefers a specific country or region when one is meant. The phrases are also a reminder that Islam is not an Arab-only religion: as the population figures below show, most Muslims live outside the Middle East.

Islamic in country names

Islamic also appears in the official names of states. Three countries currently use “Islamic Republic” in their official names: Pakistan, which adopted the title in 1956, Mauritania, which adopted it in 1958, and Iran, which adopted it after the 1979 revolution. Despite the shared wording, the three states differ greatly in their governments and laws, so the shared name does not describe a shared system. Here again the adjective describes the character of the state, not the religion of every citizen: a country can carry “Islamic” in its name while including citizens of many faiths and none.

Moslem

Moslem is an older English spelling of Muslim. Reference works record it as a former transliteration that has largely been replaced by Muslim in modern usage. There is no difference in meaning, but Muslim is the standard spelling today, and it is the one to use.

Mohammedan and Mohammedanism

These are older European terms for a Muslim and for Islam, and they should not be used as synonyms today. Reference works describe Mohammedan as largely superseded by Muslim, and note that many Muslims consider it offensive, because it suggests that Muslims worship Muhammad in the way Christians worship Christ. That suggestion contradicts the central Islamic doctrine of tawhid, the oneness of God, under which worship is directed to God alone and Muhammad is revered as a prophet and messenger, not worshipped. The Oxford English Dictionary is reported as describing the term as not employed or favored by Muslims and widely seen as depreciatory or offensive. The terms survive mainly in historical quotations and in a few institutional names that predate the change. In new writing, use Muslim and Islam.

Who counts as a Muslim?

A Muslim is someone who identifies as a follower of Islam. The Hartford Institute’s overview notes that the declaration of faith known as the shahada, “There is no god but God (Allah); Muhammad is the Messenger of God (Allah),” is the closest Islam comes to a formal creed, and that it is necessary only to declare it sincerely to become a Muslim. That account is presented here as the overview’s summary of Islamic practice, not as a rule this article imposes.

Two consequences follow. First, there is no central church, membership roll, or licensing body that certifies who is a Muslim. The Hartford overview describes the worldwide community, the umma, as defined by a common pattern of worship rather than by a denominational membership structure, which is consistent with a faith whose belonging rests on profession and practice rather than enrollment. Second, Muslims differ among themselves on law, practice, and interpretation, including the well-known Sunni and Shia branches. Those differences belong to a full guide to the religion, and they do not change the terminology: a Sunni Muslim and a Shia Muslim are both Muslims, and both follow Islam.

Why the confusion happens

Three causes explain most of the mix-ups. The first is the shared root: two words that look and sound alike, and that always appear in the same conversations, invite the assumption that they mean the same thing. The second is English itself. Other major religions give English a tidier pattern: Christianity and Christian share a stem, Judaism and Jew are plainly different words, Buddhism and Buddhist differ by a suffix. Islam and Muslim break the pattern, because the person-word comes from Arabic grammar rather than from adding an ending to the religion-word. A reader who expects the English pattern will guess wrong.

The third cause is loose usage in public language. Islam is sometimes used as shorthand for a whole civilization, as in “Islamic civilization” or “the Islamic world,” and Muslim is sometimes used as shorthand for anything associated with that civilization. Those loose uses are understandable, but they blur the line the rest of this article draws. When precision matters, return to the table: Islam for the religion, Muslim for the person, Islamic for things connected with either.

How many Muslims are there?

Population figures give the distinction a human scale. The Pew Research Center’s June 2025 analysis of the global religious landscape counted 2.0 billion Muslims in 2020, up by 347 million from 2010, making Muslims the second-largest religious group in the world after Christians, at 2.3 billion. In the same estimates, Muslims were 25.6 percent of the world population. The largest Muslim populations in 2020 were in the Asia-Pacific region, at 1.2 billion, followed by the Middle East and North Africa at 414 million and sub-Saharan Africa at 369 million, and the four countries with the most Muslims were Indonesia, Pakistan, India, and Bangladesh. Muslims were a majority of the population in 53 countries and territories.

Note what the figure counts: people, not the religion. Saying “there are 2.0 billion Muslims” is correct. Saying “there are 2.0 billion Islams” is nonsense, and it is a useful reminder of why the two words cannot be swapped. Older reference works give lower figures because they describe earlier years: Encyclopaedia Britannica’s article, for example, speaks of more than 1.5 billion Muslims in the early twenty-first century. Figures differ by date and by source, so the headline figure here is labeled to a single authority, Pew, and dated to 2020.

Test yourself

Pick Islam, Muslim, or Islamic for each gap. Answers follow.

1. She converted to ___ last year.
2. He is a ___ who prays five times a day.
3. The museum’s new exhibition covers ___ art.
4. ___ is the second-largest religion in the world.
5. A ___ family moved in next door.
6. The ___ calendar is lunar.

Answers: 1. Islam. 2. Muslim. 3. Islamic. 4. Islam. 5. Muslim. 6. Islamic. If you scored six out of six, the distinction is secure. If any answer surprised you, reread the table at the top: religion, person, adjective.

Frequently asked questions

Is Islam and Muslim the same thing? No. Islam is the religion. A Muslim is a person who follows Islam. The words share an Arabic root and are related, but they are not interchangeable.

Is Muslim a religion? No. Islam is the religion. Muslim is the word for a person who follows it. Saying “the Muslim religion” is a common error; “Islam” is the correct term.

What is the difference between Islamic and Muslim? Islamic is an adjective for things connected with Islam, such as Islamic art or Islamic history. Muslim is a noun for a person who follows Islam, and it can also work as an adjective before words for people, such as Muslim communities. Do not use Islamic for a person.

What does the word Muslim literally mean? It means “one who submits,” from the same Arabic root as Islam, which names the act of submission or surrender to the will of God. That is the literal, grammatical meaning recorded by Encyclopaedia Britannica and by the Hartford Institute’s overview.

Is an Islamist the same as a Muslim? No. An Islamist is someone who advocates a political program built on Islamic principles. Most Muslims are not Islamists, and the word Muslim says nothing by itself about a person’s politics.

Do Muslims worship Islam? No. In Islamic teaching, worship is directed to God alone, and that is one reason the older term Mohammedan is now avoided: it suggests worship of Muhammad, which contradicts the doctrine of the oneness of God. Islam is the religion Muslims follow, not an object they worship.

Can someone be a Muslim without following all of Islamic law? Muslim identity rests on profession of faith and self-identification, and Muslims vary widely in observance and interpretation. This article does not set a test for who counts, because no single authority does; the terminology point stands regardless of how observant any individual Muslim is.

What is a Muslimah? Muslimah is the feminine form of Muslim: a Muslim woman. In ordinary English, “a Muslim woman” is the more common phrasing, but Muslimah is correct and widely understood.

Where can I learn what Islam actually teaches? This article covers only the words. A companion guide titled What Is Islam? explains the beliefs, the Five Pillars, the Quran, and the history of the religion in full, and it is the right next step for readers who want the substance behind the terminology.

---

Sources & references

• Encyclopaedia Britannica, "Islam." Opened and read 25 Oct 2026. https://www.britannica.com/topic/Islam
• Hartford Institute for Religion Research (Frederick M. Denny), "Islam." Opened and read 25 Oct 2026. https://hirr.hartfordinternational.edu/articles/4366/
• Pew Research Center (Conrad Hackett), "Globally, Islam grew faster than all other religions from 2010-2020" (10 Jun 2025, updated 14 Aug 2025). Opened and read 25 Oct 2026. https://www.pewresearch.org/short-reads/2025/06/10/islam-was-the-worlds-fastest-growing-religion-from-2010-to-2020/
• Quranic Arabic Corpus, Ontology of Quranic Concepts: "Islam" (verse 3:19, Sahih International translation). Opened and read 25 Oct 2026. http://corpus.quran.com/concept.jsp?id=islam
• Quranic Arabic Corpus, Translation of verse 3:67 (Sahih International). Opened and read 25 Oct 2026. https://corpus.quran.com/translation.jsp?chapter=3&verse=67
• Wikipedia, "Mohammedan": used only as a supporting source for the history and current status of the term Mohammedan, flagged as qualified in the writer ledger. https://en.wikipedia.org/wiki/Mohammedan
• Wikipedia, "Islamic republic": used only as a supporting source for the three states using the title and their adoption dates, flagged as qualified in the writer ledger. https://en.wikipedia.org/wiki/Islamic_Republic
• Wikipedia, "Muslim" (lexicology section): used only as a supporting source for Muslimah as the feminine form and Moslem as an older spelling, flagged as qualified in the writer ledger. https://en.wikipedia.org/wiki/Muslim