There are 2 Post Offices in Watertown, South Dakota, serving a population of 22,083 people in an area of 18 square miles. There is 1 Post Office per 11,041 people, and 1 Post Office per 8 square miles.
In South Dakota, Watertown is ranked 319th of 463 cities in Post Offices per capita, and 317th of 463 cities in Post Offices per square mile.
Find addresses, phone numbers, fax numbers, hours & services for Watertown Post Offices.
United States Government - Watertown Post Office 405 East Kemp Avenue Watertown, SD Air Cargo, Mailbox Rental, Mailing Service, Postal Services
United States Postal Service 405 East Kemp Avenue Watertown, SD Mailing Service, Postal Services