Maurice Ronald MacNab, born in Hythe, Kent on 6 May 1902 – 12 April 1962, was an English cricketer.
MacNab was a left-handed batsman whose bowling style is unknown, but it is known he bowled with his left-arm.
MacNab made his only first-class appearance for Wales against the Marylebone Cricket Club in 1930.
In this match, he took the wicket of Reginald Covill, while with the bat he scored a single run in the Welsh first-innings before being dismissed by Ewart Astill, while in their second-innings he was dismissed for 2 runs by Harold Pickthall.
MacNab later made his debut for Denbighshire in the 1934 Minor Counties Championship against Durham.
He made a further two Minor Counties Championship appearances for the county, both of which came against Northumberland in 1934 and 1935.He died in Marian-glas, Anglesey on 12 April 1962.