圈号指由一个圆圈构成的符号。于台湾、日本，常用来表示「正确」的含义。

Unicode包含有多种与其相关的符号，包括：

An O mark, also known as Marujirushi (丸印) in Japan and Gongpyo (공표, 空標) in Korea, is the name of the symbol "◯" used to represent affirmation in East Asia, similar to its Western equivalent of the checkmark. Its opposite is the X mark ("✗") or ("×").