Hartman is a city in Johnson County, Arkansas, United States.

[3] Hartman is located in southwestern Johnson County on the west side of Horsehead Creek about 4 miles (6 km) north of the Arkansas River.

U.S. Highway 64 passes through the center of town, leading east 9 miles (14 km) to Clarksville, the county seat, and west 13 miles (21 km) to Ozark.

There were 258 housing units at an average density of 182.3 per square mile (70.4/km2).

21.4% of all households were made up of individuals, and 11.1% had someone living alone who was 65 years of age or older.