What is the singular possessive and plural of woman?

The singular possessive form is woman's.

The plural possessive form is women's.

An irregular plural noun that does not end with an -s forms its possessive the same as a singular noun by adding an apostrophe -s ('s) to the end of the Word.

Examples:

A woman's watch was found in the rest room. (singular)

Can you direct me to the women's department? (plural)