Tonchev () is a Bulgarian surname. Notable people with this name include:
Dimo Angelov Tonchev (born 1952), Bulgarian cyclist Gergina Toncheva (1932–2020), Bulgarian teacher Nadya Toncheva (born 2005), Bulgarian chess master Petar Tonchev (born 1989), Bulgarian footballer Stefan Tonchev (1896–1916), Bulgarian footballer Dimitar Tonchev (born 2007), Bulgarian footballer for Vighignolo calcio