IAGenWeb State Census Project - Mahaska County the goal of this project is to IAGenWeb and publish online, all State of Iowa (Non-Federal) censuses for free public genealogical research
Iowa Graves Survey - Mahaska County 1930s graves registration survey
Iowa Gravestone Photo Project - Mahaska County search gravestone photos indexed by county submitted by volunteers
Mahaska Co. Genealogy Forum read and post messages about your ancestors for this county
Mahaska County, IA Genweb Project a collection of online resources for genealogy researchers
Mahaska County Message Board read and post messages with other genealogy researchers of this county
The Tombstone Transcription Project - cemeteries for Mahaska Co. IA
US GenWeb Archives for Mahaska County cemeteries, newspapers, wills, military rosters etc recorded online
WWII Honor List of Dead and Missing

Additional Resources

Iowa Obituary Search enter your ancestor's name to search the world's largest newspaper obituary archive; over 3 Billion newspaper articles
Iowa Birth Records
Iowa Marriage Records
Iowa Divorce Records
Iowa Death Records