Jonesburg is a city in Montgomery County, Missouri, United States.

[5] Jonesburg was platted in 1858 and named in honor of James Jones, a pioneer citizen.

[6] A post office called "Jonesburgh" was established in 1868, and the name was changed to Jonesburg in 1893.

According to the U.S. Census Bureau, Jonesburg has a total area of 1.72 square miles (4.45 km2), all land.

[1] The city lies on a wide ridge which drains north toward Little Bear Creek, part of the Cuivre River watershed flowing directly to the Mississippi; and drains south toward Bear Creek, part of the Loutre River watershed leading to the Missouri River.

32.0% of all households were made up of individuals, and 17.1% had someone living alone who was 65 years of age or older.

34.9% of all households were made up of individuals, and 21.2% had someone living alone who was 65 years of age or older.