Colfax is a city in Jasper County, Iowa, United States. The town was founded in 1866, and was named for Schuyler Colfax, vice-president with U. S. Grant. The population was 2,223 at the 2000 census.
In its heyday, the city of Colfax had two main industries that drew thousands to the area: the mining of coal, and the use of the mineral springs discovered near the city.
The first large scale coal mine in Jasper County was the Watson No. 1 Mine, 5 miles southeast of town, connected to the Rock Island by a long railroad spur. From 1881 to 1900, the Jasper County Coal and Railway Company operated a number of mines north of Colfax. The Colfax Consolidated Coal Company formed in 1902, bringing the mines of Colfax under a common operator. They opened mine No. 8 in 1905; this was one of the best equipped mines in the state. The coal camp of Severs was run by this company.