Dunnigan (formerly, Antelope) is a census-designated place in Yolo County, California on Interstate 5.

[4][5] The town of Dunnigan was founded as Antelope by two early settlers, J. S. Copp and Jolin Wilson.

During the year 1853 they were living down nearer the Sacramento River, but the winter flood washed them on to higher ground and they settled on new claims here.

Next year, A. W. Dunnigan, a Yolo County postal worker, came and gave name to the place.

Other neighbors were Irving W. and William Brownell, Isaac Rice, D. T. Bird, Harry Porterfield and M. A. Rahm.

In 1876 the railroad came along, and the town plat of Dunnigan was filed for record at the county seat November 1 of that year.

According to the United States Census Bureau, the community is approximately 5.2 sq mi (13.2 km2); all land.

There were 558 housing units at an average density of 106.8 per square mile (41.2/km2), of which 407 (80.8%) were owner-occupied, and 97 (19.2%) were occupied by renters.

Since the housing boom of the early 2000s, several high scale homes have been built in the Dunnigan area.

Of particular interest to buyers and current residents is the large lots that are available for reasonable prices compared to the adjacent Sacramento market.