Apostrophe before S

Apostrophe before S

When using a possessive apostrophe, the apostrophe goes before the "s" when the possessor is singular. For example:
  • The horse's hay correct tick
  • (This is the hay of one horse, so the apostrophe is before "s.")
  • A planet's atmosphere correct tick
  • (This is the atmosphere of one planet, so the apostrophe is before "s.")
The apostrophe also goes before the "s" when the possessor is plural but does not end with an "s." For example:
  • The children's toys correct tick
  • The people's vote correct tick
  • The men's bathroom correct tick

Table of Contents

  • Apostrophe Placement Rules
  • What Is the Possessor?
  • Look Only at the Possessor
  • Summary of the Rules (with Exceptions)
  • The History of the Possessive Apostrophe
  • Test Time!
Here is a summary of the apostrophe-placement rules we will cover on this page:
apostrophe before or after s

Apostrophe Placement Rules

As covered so far, the apostrophe goes before the "s" when the possessor is singular. Conversely, the apostrophe goes after the "s" when the possessor is plural.
  • The horses' hay correct tick
  • (This is correct for more than one horse; i.e., the apostrophe goes after the "s.")
  • The horse's hay correct tick
  • (This is correct for one horse; i.e., the apostrophe goes before the "s.")

What Is the Possessor?

In the two examples above, "horses" and "horse" are the "possessors." They are the things that own whatever follows (in this case, the hay). Here are some more examples:
  • The girl's haircut correct tick
  • (In this example, the possessor is "girl." Note that the apostrophe goes before the "s.")
  • The girls' choice correct tick
  • (Here, the possessor is "girls." Note that the apostrophe goes after the "s.")
Be aware that the notion of possession is used loosely. Possession does not always relate to physical ownership. For example:
  • Michelangelo's sculpture correct tick
  • (Here, the possessor is "Michelangelo." However, this could be a sculpture by Michelangelo. He might not actually own it.)
  • The boys' changing room correct tick
  • (Here, the possessor is "boys." However, the changing room is for the boys. The boys do not actually own it.)

Look Only at the Possessor

Only the possessor is important when considering apostrophe placement. The number of things being possessed does not matter. For example:
  • The horse's meal. correct tick
  • (one horse, one meal)
  • The horse's meals. correct tick
  • (one horse, lot of meals)
  • The horses' meal. correct tick
  • (lots of horses, one meal)
  • The horses' meals. correct tick
  • (lots of horses, lots of meals)
Remember that only the number of horses matters. The number of meals is irrelevant.

Summary of the Rules (with Exceptions)

Unfortunately, there are some exceptions to the rules covered so far. Here is a summary of all the rules, including the exceptions:

Rules for placing the apostrophe before or after the "s"

When the possessor is singular, the apostrophe goes before the "s."
  • woman's blouse correct tick
When the possessor is plural, the apostrophe goes after the "s."
  • girls' attitude correct tick
Exceptions to the rules

When the possessor is singular but ends "s," the apostrophe goes after the "s."
  • Jesus' hands correct tick
  • (Note that "Jesus's hands" is also acceptable. You have a choice that depends on how you (yes, you personally) say it.)
When the possessor is plural but doesn't end "s," the apostrophe goes before the "s."
  • women's clothes correct tick
Do a final check!

Once you've put your possessive apostrophe in place, the letters to the left of the apostrophe should be the possessor spelled perfectly. Look at the examples above, the possessors are woman, girls, Jesus, and women.

The History of the Possessive Apostrophe

The main function of an apostrophe is to replace a missing letter (e.g., "can't," "doesn't"). This is related to the possessive apostrophe.

In old English, possession was shown by adding es to the possessor regardless of whether the possessor was singular or plural. For example:
  • horsees lunch (for one horse)
  • horseses lunch (for several horses)
  • womanes lunch (for one woman)
  • womenes lunch (for several women)
  • Moseses lunch (for Moses)
Over time, the "e" was replaced by an apostrophe to reflect how these words were spoken. If the new ending did not sound right (typically because of an -s's ending, then the second s was removed.

This process still works for everything. There are no exceptions.

(Step 1). Identify the possessor. For example:
  • horse
  • horses
  • woman
  • women
  • Moses
(Step 2). Add es. For example:
  • horsees
  • horseses
  • womanes
  • womenes
  • Moseses
(Step 3). Replace the e with '. For example:
  • horse's
  • horses's
  • woman's
  • women's
  • Moses's
(Step 4). If left with s's (which sounds awkward), simply remove the last s.
  • horse's correct tick
  • horses' correct tick
  • woman's correct tick
  • women's correct tick
  • Moses' correct tick
This works for everything! There are no exceptions. Read more about using apostrophes.
Read more about using apostrophes to show possession.
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This page was written by Craig Shrives.