St Nicholas and Bonvilston is a community in the Vale of Glamorgan, Wales. Formed in 1982, it includes the villages of St Nicholas, Bonvilston, and four properties in Dyffryn. In August 2020, St Nicholas had 294 dwellings and 451 electors. Bonvilston had 296 dwellings and 346 electors. The population in 2011 was 809.