Allendale County, South Carolina was formed from Barnwell and Hampton counties in 1919.
1920 Allendale County, South Carolina Census
- Free 1920 Census Form for your Research
- Free 1920 Census Images and Index (partial)
- Hosted at Ancestry.com – Ancestry Free Trial
- Hosted at Census Guide
1930 Allendale County, South Carolina Census
- Free 1930 Census Form for your Research
- Hosted at Ancestry.com – Ancestry Free Trial
- Hosted at Census Guide