Other
- Roach (cannabis culture), the butt of a marijuana cigarette
- Roach (surname), people who bear the last name Roach
- Roach (headdress), traditional Native American headdress usually of porcupine hair
- Roach, Missouri, an unincorporated community in central Missouri
- Roach, Nevada, a rail siding in southern Nevada
- Roach, a character in Apocalypse Now
- Roach, a variant of the game pool (cue sports)
- Roach, a Zerg unit from video game StarCraft II: Wings of Liberty
- Gary "Roach" Sanderson, a British SAS Task Force 141 playable character in Modern Warfare 2
- a part of a sail
- To clip, shave, or hog the mane of a horse
- a type of conformation of the back of a horse
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