Arkansas.

June 15, 1836

52, 240

1,786, 272

1,933,000

53, 104

58,216

Texas.

Dec. 29, 1845

*250,000

58,560

9,579, 677 10, 397, 000 267, 339

56, 290

56, 154

California..

Sept. 9, 1850

107,000 15,717, 204 18, 084, 000

158, 693

Formed from a portion of the territory ceded to the
United States by France, under the name of "Louisi-
ana," by the treaty of Paris of 1803. Seceded May 6,
1861. Readmitted to representation upon ratifying
the fourteenth amendment, June 22, 1868.
Formed from territory ceded to the United States by
the State of Virginia.

Formed from territory ceded to the United States by
Spain by treaty of Washington of Feb. 22, 1819.
Seceded Jan. 11, 1861. Readmitted to representa-
tion upon ratifying the fourteenth amendment, June
25, 1868.
This State was originally a part of the Republic of
Mexico, but by a successful revolt the people estab-
lished for themselves an independent republican gov-
ernment, and were subsequently annexed to the
United States. Seceded Feb. 1, 1861. Readmitted
to representation by the act of Mar. 30, 1870.
Formed from a portion of the Territory of Wisconsin,
as the "Territory of Iowa," June 12, 1838.
Formed from a portion of the territory of the State of
Michigan, as the "Territory of Wisconsin," Apr. 20,
1836.

Formed from territory ceded to the United States by
Mexico by the Treaty of Guadalupe Hidalgo of Feb.
2, 1848.

Formed from a portion of the territory ceded to the
United States by France by the treaty of Apr. 30,
1803.
96, 981 Formed from territory ceded to the United States by
the treaty with France of Apr. 30, 1803, the treaty
with Spain of Feb. 22, 1819, and the treaty with
Great Britain of June 15, 1846.

82,276

Formed from territory ceded to the United States by
France by the treaty of Apr. 30, 1803, and by the
State of Texas, in the settlement of her boundaries,
in 1850.

Formed from a portion of the territory of the State of
Virginia.

Formed from a portion of the territory ceded to the
United States by Mexico by the Treaty of Guadalupe
Hidalgo of Feb. 2, 1848.

1 By Public Law 204 of the 83d Cong., approved Aug. 7, 1953 (67 Stat. 407), Congress corrected an oversight of one and a half centuries and formally admitted the State of Ohio to the Union, setting Mar. 1, 1803, as the effective date of admission. • Estimated.

Formation

STATES ADMITTED INTO THE UNION SINCE THE ADOPTION OF THE CONSTITUTION-Continued

Area in

at time of admission

in 1960

population, July 1, 1964

square
miles

Formation

[973]

COMMONWEALTH OF PUERTO RICO, THE INSULAR POSSESSIONS, AND TRUST
TERRITORY OF THE PACIFIC ISLANDS

Commonwealth of Puerto July 25, 1952

2, 349, 544

2,577, 000

3, 435

553

Acquisition

Ceded to United States by Spain by Treaty of Paris, Dec. 10,
1898. The constitution of the Commonwealth was approved
July 3, 1952.

Under the terms of the Isthmian Canal Convention of Nov.
18, 1903, the United States acquired from the Republic of
Panama a perpetual right of occupation, use, and control of
and over a zone of land 10 miles in width. For the privilege
the United States paid the Republic of Panama $10,000,000.
The United States also pays Panama $250,000 annually, dating
from Feb. 26, 1913.
Ceded to the United States by Spain by Treaty of Paris, Dec. 10,
1898.
76 Acquired by the United States Feb. 16, 1900, under terms of
tripartite treaty Dec. 2, 1899. Full sovereignty accepted from
native chiefs by United States Feb. 20, 1929.

Guam.

Aug. 1, 1950

67,044

68, 800

225

1 Administered under jurisdiction of the Department of the Interior,

133 By purchase from Denmark, Mar. 3, 1917, for $25,000,000. The
Revised Organic Act of 1954 is the basis for the present territorial
government.

687 Occupied during World War II. Placed under the United
Nations Trusteeship system in 1947 by agreement with the
Security Council of the United Nations.

Administered under jurisdiction of the Department of the Interior except for the Saipan District, which is under Navy.

Total. 65 106 142 186 213 242 232 237 243 293 332 357 391 435 435 435 437 435

Indicates representation of new States admitted after the respective decennial census appor tionments.

NOTE: The original apportionment of Representatives was established in 1787 by the Constitution. Subsequent apportionments based on the 1st Census through the 6th Census were as follows (number of census, date of act, and ratio of persons per Representative): 1st, Apr. 14, 1792, 33,000; 2d, Jan. 14, 1802, 33,000; 3d, Dec. 21, 1811, 35,000; 4th, Mar. 7, 1822, 40,000; 5th, May 22, 1832, 47,700; 6th, June 25, 1842, 70,680. Apportionment based on the 7th Census (1850) through the 12th Census (1900) was determined by the Vinton method, and for the 13th Census (1910) and 15th Census (1930) the method of major fractions was employed, there being no reapportionment in 1920. Apportionment based on the 16th Census (1940), the 17th Census (1950), and the 18th Census (1960), was determined by the method of equal proportions, a description of which may be found in S. Doc. 304, 76th Cong., 3d sess.