'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

• All pages beginning with 's
• All pages beginning with 'S
• Apostrophe
• -s (disambiguation)
• S (disambiguation)