Colin Anderson McNab (born 3 February 1961) is a Scottish chess player.

He is Scotland's second player to be awarded the title of Grandmaster (GM), fulfilling its requirements in 1992 just after Paul Motwani.

[6] His opening repertoire is noted for its seemingly quiet fianchetto systems, and he has written a book on the fianchetto variation of the King's Indian Defence, and co-authored a book about the Pirc Defence with John Nunn.

He is renowned as an expert on the endgame and has written a regular column for Scottish Chess magazine for a number of years.

McNab is a doctor of Mathematics, having studied for a DPhil at the University of Oxford under the supervision of Peter Neumann.