#5 Monowi, Nebraska
Monowi was founded by Czech migrants in northeast Nebraska, and it has only one resident: 77-year-old Elsie Eller. Population-wise, Monowi is the smallest jurisdiction in the US. Elsie runs the town’s only tavern and library, which is made up of about 5,000 books owned by her late husband, Rudy. She also serves as the town’s mayor, clerk, and treasurer. She also runs the council.