Coalville is a census-designated place (CDP) in Webster County, Iowa, United States.

The community is located on U.S. Route 20 near Fort Dodge's large gypsum mines.

It began as one of the northernmost coal mining towns in Iowa.

Early settlers were mining coal from outcrops along the Des Moines River by 1860, and in 1870, a mine was opened on Holiday Creek, approximately one mile east of Coalville, with a three-mile tramway to the Dubuque and Sioux City Railroad (later the Illinois Central).

The Fort Dodge Coal company took over these mines and opened several more in the Coalville area.

[2] United Mine Workers local 392 was organized in Coalville in 1899; by 1907, it had 133 members.

There were 299 housing units at an average density of 137.0 per square mile (52.9/km2).

There were 289 housing units at an average density of 132.3 per square mile (51.1/km2).

29.6% of all households were made up of individuals, and 10.1% had someone living alone who was 65 years of age or older.

None of the families and 2.6% of the population were living below the poverty line, including no under eighteens and 17.8% of those over 64.