States/

Territories

before 1830s 1840s 1850s 1860s 1870s 1880s 1890s 1900s 1910s 1920s 1930s 1940s 1950s 1960s 1970s 1980s 1990s 2000s 2010s 2020s Current States/

Territories

Alabama
1861

1895
Alabama
Alaska
1927
Alaska
Arizona
1917
Arizona
Arkansas
1913

1923

1924

2011
Arkansas
California
1911
California
Colorado
1907

1911

1964
Colorado
Connecticut
1897
Connecticut
Delaware
1913
Delaware
Florida
1868

1900

1985
Florida
Georgia
1879

1902

1906

1920

1956

2001

2003
Georgia
Hawaii
1845
Hawaii
Idaho
1957
Idaho
Illinois
1915

1969
Illinois
Indiana
1917
Indiana
Iowa
1921

2018
Iowa
Kansas
1927

1961
Kansas
Kentucky
1918

1963
Kentucky
Louisiana
1861

1912

2006

2010
Louisiana
Maine
1901

1909
Maine
Maryland
1904
Maryland
Massachusetts
1908
Massachusetts
Michigan
1911
Michigan
Minnesota
1893 1893

1957

1983
Minnesota
Mississippi
1861

1894

1906

2001

2021
Mississippi
Missouri
1913
Missouri
Montana
1905

1981
Montana
Nebraska
1963
Nebraska
Nevada
1905

1915

1929

1991
Nevada
New Hampshire
1909

1931
New Hampshire
New Jersey
1896
New Jersey
New Mexico
1920
New Mexico
New York
1778

1901
New York
North Carolina
1861

1885

1991
North Carolina
North Dakota
1943
North Dakota
Ohio
1902
Ohio
Oklahoma
1911

1925

1941

1988

2006
Oklahoma
Oregon
1925
Oregon
Pennsylvania
1907
Pennsylvania
Rhode Island
1877

1882

1897
Rhode Island
South Carolina
1775

1861 1861 1861
South Carolina
South Dakota
1909

1963

1992
South Dakota
Tennessee
1897

1905
Tennessee
Texas
1837

1839
Texas
Utah
1903

1913

2011
Utah
Vermont
1770 1804

1837

1923
Vermont
Virginia
1861

1950
Virginia
Washington
1923

1967
Washington
West Virginia
1905

1907

1929
West Virginia
Wisconsin
1866

1913

1981
Wisconsin
Wyoming
1917
Wyoming
Washington, D.C. 1938 Washington, D.C.
American Samoa 1960 American Samoa
Guam 1948 Guam
Northern Mariana Islands 1976 1981 1985 Northern Mariana Islands
Puerto Rico 1895 1952 Puerto Rico
U.S. Virgin Islands 1921 U.S. Virgin Islands
States before Current States
1830s 1840s 1850s 1860s 1870s 1880s 1890s 1900s 1910s 1920s 1930s 1940s 1950s 1960s 1970s 1980s 1990s 2000s 2010s 2020s