1860-1880 Census Data (Foreign-Born)

Reports from the 1860, 1870, & 1880 Censuses

The table below includes data from all three censuses for states & territories west of Missouri.

SPECIAL NOTE: To move from a territory to a state, the territory had to have approval from Congress, which required: A state constitution & usually a minimum number of people living there (not including Indigenous people).

STATE NAME	1860 Population	1860 Percent Foreign Born	1870 Population	1870 Percent Foreign Born	1880 Population	1880 Percent Foreign Born
California	379,994	39%	560,247	37%	804,694	36%
Oregon	52,465	10%	90,923	13%	174,768	17%
Texas	604,215	7%	818,579	8%	1,591,749	7%
Arizona Terr.	-	-	9,658	60%	40,440	40%
Colorado Terr.	34,277	8%	39,864	17%	194,327	20%
Dakota Terr.	4,837	37%	14,181	34%	135,177	38%
Idaho Terr.	-	-	14,999	53%	32,610	31%
Kansas Terr.	107,206	12%	364,399	13%	996,096	11%
Montana Terr.	_	-	20,595	39%	39,159	29%
Nebraska Terr.	28,841	22%	122,993	25%	452,402	22%
Nevada Terr.	6,857	30%	42,491	44%	62,266	41%
New Mexico Terr.	93,516	7%	91,874	6%	119,565	7%
Utah Terr.	40,273	32%	86,786	35%	143,963	31%
Washington Terr.	11,594	27%	23,955	21%	75,116	21%
Wyoming Terr.	-	-	9,118	39%	20,789	28%

NOTES on Territories:

The New Mexico Territory was split into the Arizona and New Mexico Territories in 1863
The Idaho Territory was split off from the Washington Territory in 1863
The Montana Territory was split off from the Idaho Territory in 1864
The Wyoming Territory was split off from Nebraska and Dakota Territories in 1868

NOTE: When color shifts from Red to Black that indicates a territory became a state by that census year.

NOTE: The foreign born population is included in the total population

CITATION: "Percentage of Foreign Born Populations by State and Territory" 1860, 1870, & 1880 US Federal Census, United States Census Bureau, 1880.