Do may refer to:
* The verb "to do", which may serve as an auxiliary verb
* Dō (Way) (道, Tao), a number of spiritual, martial, or aesthetic disciplines
* Do (province) or Dao, a political division in Japan, North Korea, South Korea, and ancient China
* Do. or ditto marks
In music:
* Do (musical note), the first note of the musical scale in solfege
* Do (singer) or Dominique van Hulst, a Dutch singer
o Do (album), an album by Do
* "Do", a song by The White Stripes from the 1999 album The White Stripes
* Do (drum), a drum used in Korean ritual music, a type of buk
Do may also be used for:
* Do (kana), a mora symbol in Japanese writing
* Dō (胴), the torso protector part of Bōgu, kendo armor
* Do (surname), the anglicized variation of the Vietnamese surname Đỗ
* .do, the country code top-level domain for the Dominican Republic
* .do, a pseudo file extension representing an Apache Struts action
* Do, a prefix used by Dornier Flugzeugwerke aircraft
* Do, the nickname of Marshall Applewhite, the leader of the Heaven's Gate cult
* Do, short for hairdo
* Do, a party or festive social gathering,[1] British.
* GNOME Do, an application launcher for Linux
