Vonk is a Dutch metonymic occupational surname. Vonk means "spark" and refers to the work of a Smith. People with this surname include:
Britt Vonk (born 1991), Dutch softball player
Erik Vonk, Dutch banker and entrepreneur
Freek Vonk (born 1983), Dutch biologist
Hans Vonk (1942–2004), Dutch conductor, champion of Dutch composers
Hans Vonk (born 1970), South African football goalkeeper
Henk Vonk (born 1942), Dutch football trainer and scout
Marcel Vonk, Dutch poker player and physicist
Michel Vonk (born 1968), Dutch football player and manager
Rob Vonk (born 1950), Dutch modern pentathlete
Roos Vonk (born 1960), Dutch psychologist
Theo Vonk (born 1947), Dutch footballer