Clay County was formed in 1866 from the counties of Randolph and Talladega.
1870 Clay County, Alabama Census
- Free 1870 Census Form for your Research
- Hosted at Ancestry.com – Ancestry Free Trial
- Hosted at Clay County, Alabama USGenWeb Archives Project
- 1870 Clay County – Blakes Ferry
- 1870 Colleata /Coleta District Pages 185a, 185b, 195b – 203b
- 1870 Copper Mine Index
- 1870 Copper Mine Pages 235a – 236b & 204a – 210a
- 1870 Clay County – Delta And Flat Rock Districts
- Index To Grogan Census Records 1870, Clay, Alabama
- 1870 Miller Valley District Pages 279a – 284b & 267a – 269b
- 1870 Pinckneyville – Bluff Springs District Surname Index
- 1870 Pinckneyville – Bluff Springs District
- 1870 Weykoville District Pages 185b – 187a
- Hosted at Census Guide
1880 Clay County, Alabama Census
- Free 1880 Census Form for your Research
- Hosted at Ancestry.com – Ancestry Free Trial
- Hosted at Clay County, Alabama USGenWeb Archives Project
- Hosted at Census Guide
1890 Clay County, Alabama Census
- Free 1890 Census Form for your Research
- Hosted at Ancestry.com – Ancestry Free Trial
- Hosted at Census Guide
1900 Clay County, Alabama Census
- Free 1900 Census Form for your Research
- Hosted at Ancestry.com – Ancestry Free Trial
- Hosted at Clay County, Alabama USGenWeb Archives Project
- Hosted at Census Guide
1910 Clay County, Alabama Census
- Free 1910 Census Form for your Research
- Hosted at Ancestry.com – Ancestry Free Trial
- Hosted at Census Guide
1920 Clay County, Alabama Census
- Free 1920 Census Form for your Research
- Hosted at Ancestry.com – Ancestry Free Trial
- Hosted at Margaret Arnold’s Lil’ Research Site
- 1920 Clay County Census Transcription
- Coppermine Beat 2
- Precinct 12 Idaho
- 1920 Clay County Census Transcription
- Hosted at Census Guide
1930 Clay County, Alabama Census
- Free 1930 Census Form for your Research
- Hosted at Ancestry.com – Ancestry Free Trial
- Hosted at Census Guide