Illinois Route 116 leads west from Ashkum 37 miles (60 km) to Pontiac.

According to the 2021 census gazetteer files, Ashkum has a total area of 0.84 square miles (2.18 km2), all land.

26.36% of all households were made up of individuals, and 10.00% had someone living alone who was 65 years of age or older.

Ashkum is one of three municipalities in Iroquois County (along with Chebanse and Clifton) that are served by Comcast's South Suburban Chicago system (which is based out of Homewood and also serves the Kankakee area).

[7] This means that for local broadcast channels, Ashkum receives stations from the Chicago area and does not receive any stations from the Champaign–Springfield–Decatur market, which includes Iroquois County.