Dub can refer to:

• dub music, a sub-genre of reggae music
• a mostly-instrumental remix, usually without lyrics but still with chorus
• dubbing, the process of recording or replacing voices for a motion picture
• dubbing, also the process of copying audio and video information, particularly to or from tape to other media such as DVD or videotape
• the Celtic god Carman
• a colloquial term for a Dubliner
• an ebonics system unit of measurement representing 20 items
• mud or dirt