- The Political Graveyard: Polk County, Nebraska - Database provides brief biographies of politicians who were born or lived in the county, a cemetery list, and political history.
- Polk County - NEGenWeb - Highlights online genealogy databases, cemetery records, lookups, and other resources.
- Polk County Rural Public Power District - Serves consumers in Polk and parts of Merrick, York, Nance, and Butler Counties. Includes details of programs, the company's history, management list, and billing and payment information.
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