Theo Vonk (born 16 December 1947) is a Dutch former football player and manager, most recently in charge of Gibraltar Premier Division side Glacis United, where he also served as technical director.
He spent the majority of his playing career at AZ'67, playing for them as a central defender for ten years from 1968 to 1978, before spending a year at FC Volendam and subsequently retiring.
After retiring from playing, he joined his boyhood club AZ'67 as assistant manager, spending five years at the club before moving to Sparta Rotterdam in 1984.
A disastrous spell in Spain with Real Burgos followed in 1992, after which he became something of a journeyman manager, aside from three years in charge of AZ.
Five years after leaving his last job at Sportclub Enschede, he joined Glacis United as manager and technical director.