's

 's may refer to:


 * 's, an ending used to form the possessive of English nouns and noun phrases
 * 's, a contraction of the English words is and has
 * 's, a form of the English plural ending, written after single letters and in some other instances
 * Greengrocers' apostrophes, a non-standard manner to form noun plurals
 * 's, a contraction of the old Dutch genitive article des, appearing in names such as 's-Hertogenbosch