J
- Jacksonville
- Jacob
- Jalapa
- Jamaica
- Jamesburg
- Jamestown
- Jamestown
- Janesville
- Jaques
- Jefferson City
- Jefferson Corners
- Jeffersonville
- Jeiseyville
- Jenkins
- Jenkins
- Jerome
- Jerseyville
- Jewett
- Jimtown
- Joetta
- Johannisburg
- Johnsburg
- Johnson Siding
- Johnsonville
- Johns Spur
- Johnston City
- Johnstown
- Joliet
- Jones
- Jonesboro
- Jones Ridge
- Jonesville
- Jonesville
- Joppa
- Joppa Junction
- Jordan Center
- Joslin
- Joy
- Joy Prairie
- Jules
- Junction
- Junction City
- Justice