Stonier is a surname. Notable people with the surname include:
G. W. Stonier (1903–1985), English critic, novelist and radio playwright and a literary editor of the New Statesman Matthew Stonier (born 2001), English athlete Michael Stonier (born 1969), South African cricketer Monica Stonier (born 1976), American politician of the Democratic Party Nigel Stonier (born 1956), English rock, roots and pop producer, songwriter and multi-instrumentalist Ron Stonier (1933–2001), Canadian painter Tom Stonier (1927–1999), German biologist and educator