IAGenWeb State Census Project - Union 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 - Union County 1930s graves registration survey
Iowa Gravestone Photo Project - Union County search gravestone photos indexed by county submitted by volunteers
Union Co. Genealogy Forum read and post messages about your ancestors for this county
Union County, IA Genweb Project a collection of online resources for genealogy researchers
Union County Message Board read and post messages with other genealogy researchers of this county
The Tombstone Transcription Project - cemeteries for Union Co. IA
US GenWeb Archives for Union County cemeteries, newspapers, wills, military rosters etc recorded online

Additional Resources

Indiana Newspaper Search enter your ancestor's name to instantly search the world's largest newspaper archive; over 12 million newspaper pages
Iowa Birth Records
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Iowa Death Records