Possessive Nouns
Learn how nouns change form to show that something belongs to, or is connected with, a person, place or thing.
Showing belonging
A possessive noun shows a connection between two nouns.
A possessive noun shows that something belongs to, or is closely connected with, a person, place or thing. Possessive nouns are usually formed by adding an apostrophe and, in many cases, the letter -s.
In the phrase Maria’s book, Maria’s is the possessive noun. It shows that the book belongs to Maria.
The apostrophe is placed differently depending on whether the noun is singular or plural, and on whether the plural form already ends in -s.
Before you begin
Possessive nouns are still nouns.
This lesson looks at how nouns change form to show possession. It does not change what a noun is or how it names people, places or things.
If you would like to review what nouns are and how they work, begin with the Nouns lesson.
The central idea
The apostrophe placement depends on singular or plural form.
Compare the two patterns and notice where the apostrophe sits.
01
Singular Possessive
Add an apostrophe and -s to a singular noun to show possession.
the dog’s bowl
Maria’s book
the teacher’s desk
02
Plural Possessive
Add only an apostrophe after a plural noun that already ends in -s.
the dogs’ bowls
the students’ books
the teachers’ desks
The useful question is: Does the noun already end in -s?
dog → dog’s
dogs → dogs’
child → child’s
children → children’s
If the noun does not already end in -s, add ‘s. If it already ends in -s because it is plural, add only an apostrophe.
Forming the singular possessive
Add an apostrophe and -s to most singular nouns.
Singular nouns
the cat’s tail
my sister’s car
the company’s plan
The manager’s office is on the second floor.
Singular nouns that already end in -s
James’s car
the boss’s office
the class’s project
Most singular nouns that end in -s still add ‘s in the possessive form. Some style guides allow just an apostrophe for names ending in -s, such as James’, but adding ‘s is the more common pattern.
Forming the plural possessive
The apostrophe placement depends on the plural spelling.
Regular plurals ending in -s
the students’ results
the birds’ nests
my parents’ house
The players’ uniforms were still wet from the rain.
Since the plural already ends in -s, only an apostrophe is added after it.
Irregular plurals that do not end in -s
the children’s toys
the men’s room
the people’s choice
Irregular plurals such as children and men do not end in -s, so they follow the singular pattern and add ‘s.
Possession with two or more nouns
The apostrophe placement can show joint or separate possession.
Joint possession
Tom and Anna’s apartment is downtown.
When two people own the same thing together, the apostrophe is added only to the second name.
Separate possession
Tom’s and Anna’s apartments are in different buildings.
When each person owns a separate thing, the apostrophe is added to both names.
Possessive of compound nouns
The apostrophe is added to the last word of the phrase.
Compound nouns and titles
my mother-in-law’s advice
the editor-in-chief’s decision
the King of Spain’s visit
Even though these phrases contain more than one word, the possessive apostrophe is added only once, at the end of the whole phrase.
A useful decision guide
Check the noun’s form, then place the apostrophe.
01
Is the noun singular?
Add an apostrophe and -s.
the dog’s lead
02
Is the noun plural and already ending in -s?
Add only an apostrophe.
the dogs’ leads
03
Is the plural irregular, without a final -s?
Add an apostrophe and -s.
the children’s leads
04
Do two or more nouns share the same thing?
Add the apostrophe once for joint possession, or once per noun for separate possession.
Common mistakes
Do not confuse a plain plural with a possessive noun.
A plain plural does not need an apostrophe.
Not: I have two dog’s.
Correct: I have two dogs.
An apostrophe is only needed when the noun shows possession, not simply when it is plural.
Its and it’s are not the same word.
its → possessive form of it
it’s → short form of it is or it has
The dog wagged its tail. It’s a warm afternoon.
Unlike most possessive nouns, the possessive form of it does not take an apostrophe.
The apostrophe position changes the meaning.
the student’s book → one student
the students’ book → more than one student
Moving the apostrophe changes how many owners the sentence describes.
Check your understanding
Singular possessive or plural possessive?
Choose the correct form for the highlighted noun.
The teacher’s notes were on the desk.
✅ Exactly! The apostrophe comes before the -s, showing one teacher.
❎ Not quite. Look at where the apostrophe sits in relation to the -s.
An apostrophe before the -s usually signals one owner.
The students’ results were posted online.
✅ Exactly! The apostrophe comes after the -s, showing more than one student.
❎ Not quite. Look at where the apostrophe sits in relation to the -s.
The children’s playground was newly painted.
✅ Exactly! Children’s follows the singular pattern of apostrophe plus -s.
❎ Not quite. Remember that children does not already end in -s.
The dogs’ bowls were empty by morning.
✅ Exactly! The apostrophe after the -s shows more than one dog.
❎ Not quite. Check whether the apostrophe comes before or after the final -s.
Choose the best explanation
Select the sentence that explains the possessive correctly.
Why does the boys’ team use an apostrophe after the -s?
✅ Exactly! Only an apostrophe is added after a plural noun that already ends in -s.
❎ Not quite. Look at the spelling of boys before the apostrophe is added.
Why does it’s not follow the usual possessive pattern?
✅ Exactly! It’s is a contraction, while its shows possession without an apostrophe.
❎ Not quite. Think about what the apostrophe in it’s actually replaces.
Which sentence shows joint possession correctly?
✅ Exactly! For joint possession, the apostrophe is added only to the second name.
❎ Not quite. Think about how many cars are being described.
Try it another way
Write the possessive form.
Type the correct possessive noun to complete each sentence.
✅ Exactly! A singular noun adds an apostrophe and -s.
❎ Not quite. Add an apostrophe and -s to the singular noun dog.
✅ Exactly! A plural noun already ending in -s adds only an apostrophe.
❎ Not quite. Teachers already ends in -s, so only an apostrophe is needed.
✅ Exactly! Men is an irregular plural, so it adds an apostrophe and -s.
❎ Not quite. Men does not end in -s, so it follows the singular pattern.
Edit the sentence
Rewrite each sentence using the correct possessive form.
Use the noun in brackets to complete the rewrite.
The food bowl belonging to the cat is empty. (cat’s)
✅ Exactly! Cat’s shows that the bowl belongs to one cat.
❎ Not quite. Begin with The cat’s food bowl and keep the rest of the meaning.
The coats belonging to the girls were hanging by the door. (girls’)
✅ Exactly! Girls’ shows that the coats belong to more than one girl.
❎ Not quite. Add only an apostrophe after the plural noun girls.
The garden belonging to my brother-in-law is huge. (brother-in-law’s)
✅ Exactly! The apostrophe attaches once, at the end of the whole phrase.
❎ Not quite. Add the apostrophe and -s to the very end of brother-in-law.
Quick review
Check the ending, then place the apostrophe.
Possessive nouns show that something belongs to, or is connected with, a person, place or thing.
Most singular nouns add ‘s, such as the dog’s bowl.
Plural nouns that already end in -s add only an apostrophe, such as the dogs’ bowls.
Irregular plurals that do not end in -s, such as children, add ‘s like a singular noun.
Joint possession adds the apostrophe once, to the last name; separate possession adds it to each name.
Compound nouns and titles add the apostrophe once, at the end of the whole phrase.
Its is the possessive form of it and does not take an apostrophe; it’s is a short form of it is or it has.
Remember
Ask what the noun already ends in.
If the noun does not end in -s, add ‘s. If it already ends in -s because it is plural, add only an apostrophe. Meaning, not habit, should guide where the apostrophe goes.