Comma After Apostrophe- Is It Correct? Grammar Guide

The Short Answer: No Comma After an Apostrophe

Here's the deal: there is never a comma placed after an apostrophe. Not after contractions, not after possessives, not after pluralized letters. The apostrophe already does its job. Adding a comma is redundant and marks you as someone who doesn't know the rule.

English punctuation has rules. Most of them make sense once you understand the logic behind them. This one is straightforward—apostrophes and commas are two separate punctuation marks with two separate functions. They don't mix.

Why People Get Confused

The confusion comes from two sources:

• Apostrophes look similar to single quotes, which sometimes get treated differently in informal writing
• People confuse the possessive apostrophe with other punctuation rules they've half-remembered

Neither of these is a good excuse. The rule is clear: apostrophe + comma = wrong. Every time.

Apostrophes in Contractions

Contractions combine two words by replacing letters with an apostrophe. The apostrophe marks where letters were removed.

Examples:

• don't (do not)
• it's (it is)
• won't (will not)
• they're (they are)

When you write a contraction, you close it with a period if needed, or nothing at all. A comma never follows the apostrophe. "It's, fine" is wrong. "It's fine" is correct.

Apostrophes in Possessives

Possessive apostrophes show that something belongs to someone or something. The placement changes depending on whether the noun is singular or plural.

Singular Possessives

Add 's to singular nouns:

• the dog's bone
• Sarah's car
• the company's policy

Plural Possessives

For regular plurals ending in -s, add just the apostrophe after the -s:

• the dogs' toys
• the students' grades
• the Smiths' house

For irregular plurals that don't end in -s, add 's like singular nouns:

• the children's room
• the women's rights
• the mice's nest

Again: no comma after any of these.

Apostrophes in Pluralized Letters and Words

When you pluralize individual letters, acronyms, or words referred to as words, you use an apostrophe. This is one of the few cases where apostrophes are actually needed for plurals.

• Mind your p's and q's.
• The word "cat" has three letters.
• She dotted her i's.
• Too many and's and but's in that sentence.

The apostrophe prevents confusion. Without it, "as" could look like the word instead of the letter. Still no comma follows these apostrophes.

The One Time You Might See Apostrophe + Comma

There is exactly one construction where an apostrophe and comma appear adjacent: when you're quoting speech that ends with an apostrophe in the original.

Example:

She said, "I can't believe it's gone."

In this case, the apostrophe is part of the contraction "can't" inside the quoted speech. The comma is outside the quotation marks, closing the quoted phrase. This isn't a comma after an apostrophe—it's a comma after a quotation.

Common Mistakes and How to Fix Them

Notice the pattern? The comma never touches the apostrophe. Ever.

Practical How-To: Getting It Right

Here's a simple checklist for any sentence where an apostrophe appears:

1. Identify the apostrophe. Is it marking a contraction, a possessive, or pluralizing a letter?
2. Determine what punctuation the sentence needs. Does it need a comma, period, or nothing?
3. Place the punctuation after the word, not after the apostrophe. The apostrophe sits inside the word. The comma sits after the word.

Example walkthrough:

Original: "The dog is mine's"

Step 1: Apostrophe marks possessive. "mine's" isn't standard—you'd say "the dog is mine" or "the dog is mine, but the leash belongs to her."

Let's try: "The dog's, leash is red."

Step 1: Apostrophe marks possessive. The leash belongs to the dog.

Step 2: The sentence needs a comma? No. This is a simple declarative statement.

Step 3: No comma needed. The correct sentence is "The dog's leash is red."

Try again: "Sarah's car, which is red, broke down."

Step 1: Apostrophe marks possessive. The car belongs to Sarah.

Step 2: The sentence needs commas for the non-restrictive clause.

Step 3: Place commas after the words they modify, not after the apostrophe.

Correct: "Sarah's car, which is red, broke down."

The Bottom Line

Comma after apostrophe is always wrong. Apostrophes mark contractions, possessives, or clarify pluralized letters. Commas separate clauses, items in lists, or set off phrases. They operate independently.

If you've been making this mistake, stop now. It's one of the more obvious grammar errors that educated readers notice immediately. The fix takes five seconds: just delete the comma.

That's it. There's nothing more to it.