South Dakota Directory | North Dakota Directory- Watertown, SD > Watertown Zip Codehttp://www.dakotawebvisions.com/watertownsd/watertownzipcode/Website Directory for South Dakota and North Dakota Watertown Zip Codehttp://www.dakotawebvisions.com/watertownsd/As you can see we have all the area zip codes listed here for South Dakota. It may be a good idea to bookmark or make this page a favorite. The zip codes for Watertown, South Dakota is 57201.Tue, 02 Mar 2010 15:02:07 GMT