Letts Public Library
- Features annual report, history, mission statement, policies, director's profile, events, reading lists, links to research databases and hours.
- http://www.letts.lib.ia.us/

City-Data.com: Letts, Iowa
- Profiles housing, population demographics, jobs, weather and climate tables. Contains a list of area hospitals, schools, airports, radio and TV broadcast stations, charts and maps.
- http://www.city-data.com/city/Letts-Iowa.html

Wikipedia: Letts, Iowa
- Encyclopedia article covers geography and demographics of this community in Louisa County.
- http://en.wikipedia.org/wiki/Letts,_Iowa