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- Umpire Township, Howard County
- Union Township, Ashley County
- Union Township, Baxter County
- Union Township, Conway County
- Union Township, Faulkner County
- Union Township, Fulton County
- Union Township, Greene County
- Union Township, Independence County
- Union Township, Izard County
- Union Township, Jackson County
- Union Township, Lee County
- Union Township, Marion County
- Union Township, Nevada County
- Union Township, Ouachita County
- Union Township, Perry County
- Union Township, Prairie County
- Union Township, Randolph County
- Union Township, Saline County
- Union Township, Stone County
- Union Township, Van Buren County
- Union Township, White County
- Union Valley Township, Perry County
- Uniontown Township, Crawford County
- Upper North Township, Sharp County
- Upper Surrounded Hill Township, Prairie County
- Upper Township, Crawford County
- Upper Township, Sebastian County
Read more about this topic: List Of Arkansas Townships