[6][7] A lawyer from Topeka, Abraham Jetmore was instrumental in securing a railroad line through the city and in arranging for it to become the county seat.

[8] According to the United States Census Bureau, the city has a total area of 4.49 square miles (11.63 km2), all land.

[9] The Buckner Creek, a tributary of the Pawnee River, flows through Jetmore.

The surface rocks in this area consist of Greenhorn Limestone and Graneros Shale.

[10][11] The climate in this area is characterized by hot, humid summers and generally mild to cool winters.

[12] The 2020 United States census counted 770 people, 333 households, and 208 families in Jetmore.

There were 378 housing units at an average density of 89.8 per square mile (34.7/km2).

33.6% of households consisted of individuals and 18.3% had someone living alone who was 65 years of age or older.

33.6% of all households were made up of individuals, and 22.2% had someone living alone who was 65 years of age or older.

31.2% of all households were made up of individuals, and 18.8% had someone living alone who was 65 years of age or older.

The community is served by Hodgeman County USD 227 public school district.