O'

O', O’, O`, O´, O‘ or Oʻ may refer to:


 * the anglicized variant of the patronymic term "Ó" in Irish names (like in O'Sullivan)
 * short for "of" or "on" (like in Pot o' Gold, John o' Groats or o'clock)
 * a misspelling of the letter "O" with a diacritic like Ó, Ò, or Ơ.
 * Oʻ, the twenty-fifth letter of the Uzbek alphabet
 * O′ (with prime symbol) represents the glottalized or creaky vowel "/o̰/" in Taa language
 * ’O or ’o is the masculine singular article in Neapolitan (as in ’O sole mio "my sunshine")