Jan Maurits Quinkhard was an 18th-century painter and print designer from the Northern Netherlands.

Quinkhard was born in the town of Rees, near Cleves. He was a Dutch painter and scholar of his father (the painter Julius Quinkhardt the elder), Arnold van Boonen, Christoffel Lubinietski, and Nikolaas Verkolje. He painted familiar, allegorical, and mythological subjects, and was excellent in portraits, of which he painted a great number. Five good examples are in the Amsterdam Museum. His son Julius (1736-1776) was instructed by his father, but abandoned art for commerce. Two pictures by him are in the Amsterdam Museum. He also collaborated with Jacobus Houbraken and other leading engravers on prints of the rich and famous of Amsterdam.

His pupils were Jurriaan Andriessen, Ludolf Backhuijzen (II), Jan de Beijer, Johannes Cornelis Mertens, his son Julius Henricus Quinkhard, Tibout Regters, Izaak Schmidt, Adriaan Schregardus, Jan Stolker, Johannes Verrier, Pieter Wagenaar (II), and Jan Gerard Waldorp. He died, aged 84, at Amsterdam.