Look up Colby in Wiktionary, the free dictionary.
Colby most often refers to:
- Colby (given name), a list of people
- Colby (surname), a list of people
- Colby cheese (originally 'Colby Cheddar'), a type of cheese made from cow's milk
- Colby-Jack, a mixture of Colby and Monterey Jack cheeses
Colby may also refer to: