Kilcolman Bog is a national nature reserve of approximately 74 acres (0.30 km2) in County Cork.

Kilcolman Bog was legally protected as a national nature reserve by the Irish government in 1993.

[3] Kilcolman Bog is a fen[4] and is located south of the Ballyhoura Mountains.

Greenland white fronted geese and thousands of duck overwinter in the reserve.

[4] In 2017, Birdwatch Ireland took ownership of the private parts of the reserve from the previous owners, Richard and Margaret Ridgway.