756,668

637,651

Area in
square
miles

Formation

69 Established under Art. I, sec. 8, clause 17 of Constitution. Territory originally ceded by
Maryland (legislative act of Dec. 23, 1788) and Virginia (legislative act of Dec. 3, 1789).
Cessions accepted by Congress by act of July 16, 1790; lines and bounds established by
proclamation of President Washington, Mar. 30, 1791. Virginia's cession retroceded by act
of Congress July 9, 1846. The government of the District is administered by a Mayor and
a 13-member Council, all of whom are elected by the citizens of the District of Columbia.
All acts of the council are reviewable by Congress. (Dec. 24, 1973, Pub. L. 93-198.)
Pursuant to the District of Columbia Delegate Act the District of Columbia now has a
non-voting Delegate to the House of Representatives. (Sept. 22, 1970, Pub. L. 91-405,
§§ 201-206, 84 Stat. 848.)

[973]

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

American Samoa.

Virgin Islands.

Trust Territory of the Pacific Islands.

Northern Mariana Islands.

Administered under jurisdiction of the Department of the Interior, with a locally drafted constitution and elected governor and legislature.

Total

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

*Indicates representation of new States admitted after the respective decennial census apportionments. 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.