Chipping Ongar is a market town and former civil parish, now in the parish of Ongar, in the Epping Forest District of the county of Essex, England. It is located 6 miles (10 km) east of Epping, 7 miles (11 km) southeast of Harlow and 7 miles (11 km) northwest of Brentwood. In 2020 the built-up area had an estimated population of 6420.

A market town is a settlement most common in Europe that obtained by custom or royal charter, in the Middle Ages, a market right, which allowed it to host a regular market; this distinguished it from a village or city. In Britain, small rural towns with a hinterland of villages are still commonly called market towns, as sometimes reflected in their names.