The Civil Rights Act (1866) was passed by Congress on 9th April 1866 over the veto of President Andrew Johnson.
Square Miles of United States. The square miles of United States is 3,794,101 sq mi. This is equivalent to 9,826,675 km2. In terms of size comparison, it is slightly larger than the Peopleâs Republic of China. The 2010 estimated population is 310,931,000.
Of this area, 2,959,064.44 square miles (7,663,941.7 km 2) is land, composing 83.65% of U.S. land area, just slightly larger than that of Australia. Officially, 160,820.25 square miles (416,522.5 km 2) is water area, composing 62.66% of the nation's water area. The contiguous United States would be placed 5th in the list of countries and dependencies by area; the total area of the country, including Alaska and Hawaii, ranks third.