Conker may refer to:
- Horse chestnuts
- The seed of the horse chestnut, Aesculus hippocastanum
- Conkers, a traditional children's game, using the seed threaded on a string
- Video games
- Conker (series), a video game franchise by Rare
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- Conker's Pocket Tales, the debut game in the series
- Conker's Bad Fur Day, the second game in the series
- Conker: Live & Reloaded, the remake of the second game in the series
- Conker the Squirrel, the main character in the series
- Other
- Conkeror, a web browser
- Conkerberry, the plant Carissa spinarum