The Watertown Regional Genealogical Society meets at the library at 1 p.m. on the second Tuesday of each month.
- AncestryPlus (available only in the library for free)
- Local Cemeteries
- Obituary search on RootsWeb (Enter "watertownpo" in the search field to bring up an alphabetical list)
- Obituaries in the Public Opinion (Searchable and browsable listings by name and date)
- South Dakota Gravestones