Courtice (/ˈkɜːr.tɪs/) is a community in Ontario, Canada, about 60 km (37 mi) east of Toronto, within the Municipality of Clarington.

It is contiguous with the urban area of the neighbouring City of Oshawa, but separated by rural areas from other communities within Clarington itself; accordingly, in the Canada 2011 Census, Courtice was counted as part of the population centre of Oshawa rather than Bowmanville or Newcastle.

George Short owned the blacksmith shop there where today Roy Nichols Motors sits.

Beside it on the east was James Courtice's carpenter shop, built in 1874; and on the west was the Post office run by John Walter in 1908.

and Highway 2, where a townhouse complex sits, is where the Courtice Cheese factory and shop was located.

It was once called Black's Hill and in 1825 was the site of the first post office in Darlington Township located just east of today's Stuttering Johns's Smokehouse.

The children of Prestonvale went to a school (Section #8) called Mount Carswell located on the north side of Concession 3 (now Nash Rd), just west of Trulls Rd on James Reynolds' farmstead.

A post office with the name "Courtice" was finally established in the mid 19th century, and rail connections became available on both the Canadian Pacific and Grand Trunk main lines which passed south of the village closer to Lake Ontario.

Courtice remained primarily a small rural village well into the 20th century, but housing developments beginning in the mid-1980s caused the community to grow rapidly.

By the mid-1990s growth had slowed somewhat, although new housing developments are continuing and the area remains popular due to relatively low prices.

Housing is primarily single-family detached residential, and most residents travel to Toronto or points west in Durham Region for employment.

With the increased housing developments in the area by the late 1980s and early 1990s, the residents of Courtice had already asked for a new postal address and community identity.

The Town of Newcastle (now Clarington, Ontario) authorized Canada Post to provide the new postal identity and establish Courtice's boundaries.

The Courtice Community Complex includes a large indoor pool optimized for family and lap swimming, a separate wading pool for children, a large water-slide, sauna, hot-tub, weight and training facilities and numerous meeting rooms.