Ouachita County was formed from Union County in 1842.
1850 Ouachita County, Arkansas Census
- Free 1850 Census Form for your Research
- Free 1850 Census Images (partially indexed)
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- Free 1850 Census Index
- Free 1850 Census Transcription
- Hosted at Census Guide
1860 Ouachita County, Arkansas Census
- Free 1860 Census Form for your Research
- Free 1860 Census Images and Index
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- Free 1860 Census Transcription (partial)
- Behistian Township
- Carouse Township
- Ecore Fabre Township
- Marion Township
- Smackover Township
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1870 Ouachita County, Arkansas Census
- Free 1870 Census Form for your Research
- Free 1870 Census Images and Index
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1880 Ouachita County, Arkansas Census
- Free 1880 Census Form for your Research
- Free 1880 Census Transcription
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- Hosted at Census Guide
1890 Ouachita County, Arkansas Census
- Free 1890 Census Form for your Research
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1900 Ouachita County, Arkansas Census
- Free 1900 Census Form for your Research
- Free 1900 Census Images and Index
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- Hosted at Census Guide
1910 Ouachita County, Arkansas Census
- Free 1910 Census Form for your Research
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1920 Ouachita County, Arkansas Census
- Free 1920 Census Form for your Research
- Free 1920 Census Images and Index (partial)
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- Hosted at Census Guide
1930 Ouachita County, Arkansas Census
- Free 1930 Census Form for your Research
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- Free 1930 Census Index (partial)
- Free 1930 Census Transcription (partial)
- Hosted at Census Guide