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Umatilla County, Oregon Census

Umatilla County, Oregon was formed from Wasco County in 1862.

1870 Umatilla County, Oregon Census

1880 Umatilla County, Oregon Census

1890 Umatilla County, Oregon Census

1900 Umatilla County, Oregon Census

1910 Umatilla County, Oregon Census

1920 Umatilla County, Oregon Census

1930 Umatilla County, Oregon Census