NationMaster - Encyclopedia: Mean center of United States population

The mean center of U.S. population is determined by the United States Census Bureau after tabulating the results of each census. The Bureau defines it to be: The United States Census Bureau (officially Bureau of the Census as defined in Title ) is a part of the United States Department of Commerce. ...

the point at which an imaginary, flat, weightless, and rigid map of the United States would balance perfectly if weights of identical value were placed on it so that each weight represented the location of one person on the date of the census.

During the 20th century, the mean center of population has shifted 324 miles (521 km) west and 101 miles (163 km) south. The southerly movement was much stronger during the second half of the century; 79 miles (127 km) of the 101 miles (163 km) happened between 1950 and 2000. (19th century - 20th century - 21st century - more centuries) Decades: 1900s 1910s 1920s 1930s 1940s 1950s 1960s 1970s 1980s 1990s As a means of recording the passage of time, the 20th century was that century which lasted from 1901–2000 in the sense of the Gregorian calendar (1900–1999...

Mean center of population for the United States, 1790–2000 (U.S. Census Bureau)

The following counties included the mean center of U.S. population since 1790:

The addition of Alaska and Hawaii to the union had the effect of moving the center about two miles farther south and about ten miles farther west for 1960. 1790 was a common year starting on Friday (see link for calendar). ... Location in the state of Maryland Formed 1642 Seat Chestertown Area - Total - Water 1,073 kmÂ² (414 miÂ²) 349 kmÂ² (135 miÂ²) 32. ... 1800 (MDCCC) was an exceptional common year starting on Wednesday of the Gregorian calendar, but a leap year starting on Sunday of the Julian calendar. ... Howard County is a county located in the central part of the U.S. state of Maryland, between Baltimore and Washington, D.C. The county was named for John Eager Howard, an officer in the American Revolutionary War and Governor of Maryland. ... 1810 was a common year starting on Monday (see link for calendar). ... Loudoun County, Virginia is part of the Washington-Baltimore Metropolitan Area. ... 1820 was a leap year starting on Saturday (see link for calendar). ... Hardy County is a county located in the state of West Virginia. ... Liberty Leading the People by EugÃ¨ne Delacroix commemorates the July Revolution 1830 (MDCCCXXX) was a common year starting on Friday (see link for calendar). ... Grant County is a county located in the state of West Virginia. ... 1840 is a leap year starting on Wednesday (link will take you to calendar). ... Upshur County is a county located in the state of West Virginia. ... 1850 was a common year starting on Tuesday (see link for calendar). ... The Wirt County Courthouse in Elizabeth Wirt County is a county located in the U.S. state of West Virginia. ... 1860 is the leap year starting on Sunday. ... Pike County is a county located in the state of Ohio. ... 1870 (MDCCCLXX) was a common year starting on Saturday (see link for calendar) of the Gregorian calendar or a common year starting on Monday of the 12-day-slower Julian calendar. ... Highland County is a county located in the state of Ohio. ... Year 1880 (MDCCCLXXX) was a leap year starting on Thursday (link will display the full calendar). ... Boone County is a county located in the state of Kentucky. ... 1890 (MDCCCXC) was a common year starting on Wednesday (see link for calendar) of the Gregorian calendar (or a common year starting on Friday of the Julian calendar). ... Decatur County is a county located in the U.S. state of Indiana. ... 1900 (MCM) was an exceptional common year starting on Monday of the Gregorian calendar, but a leap year starting on Saturday of the Julian calendar. ... Location in the state of Indiana Formed 1821 Seat Columbus Area - Total - Water 1,060 kmÂ² (409 miÂ²) 7 kmÂ² (3 miÂ²) 0. ... 1910 (MCMX) was a common year starting on Saturday (see link for calendar) of the Gregorian calendar or a common year starting on Sunday of the 13-day slower Julian calendar. ... Monroe County is a county located in the state of Indiana, and determined by the U.S. Census Bureau to include the mean center of U.S. population in 1910. ... Year 1920 (MCMXX) was a leap year starting on Thursday. ... Year 1930 (MCMXXX) was a common year starting on Wednesday (link is to a full 1930 calendar). ... Greene County is a county located in the state of Indiana, and determined by the U.S. Census Bureau to include the mean center of U.S. population in 1930. ... Year 1940 (MCMXL) was a leap year starting on Monday (the link is to a full 1940 calendar). ... Sullivan County is a county located in the state of Indiana, and determined by the U.S. Census Bureau to include the mean center of U.S. population in 1940. ... 1950 (MCML) was a common year starting on Sunday (link will take you to calendar). ... Clay County is a county located in the U.S. state of Illinois, and determined by the U.S. Census Bureau to include the mean center of U.S. population in 1950. ... 1960 (MCMLX) was a leap year starting on Friday (the link is to a full 1960 calendar). ... Clinton County is a county located in the U.S. state of Illinois, and determined by the U.S. Census Bureau to include the mean center of U.S. population in 1960. ... 1970 (MCMLXX) was a common year starting on Thursday (the link is to a full 1970 calendar). ... St. ... 1980 (MCMLXXX) was a leap year starting on Tuesday. ... Jefferson County is a county located in the U.S. state of Missouri, and included the mean center of U.S. population in 1980. ... ... Crawford County is a county located in the U.S. state of Missouri, and determined by the U.S. Census Bureau to include the mean center of U.S. population in 1990. ... This article is about the year 2000. ... Phelps County is a county located in the state of Missouri, and according to the U.S. Census Bureau it includes the mean center of U.S. population in 2000. ... Official language(s) English Capital Juneau Largest city Anchorage Area Ranked 1st - Total 663,267 sq mi (1,717,855 kmÂ²) - Width 808 miles (1,300 km) - Length 1,479 miles (2,380 km) - % water 13. ... Official language(s) English, Hawaiian Capital Honolulu Largest city Honolulu Area Ranked 43rd - Total 10,931 sq mi (29,311 kmÂ²) - Width n/a miles (n/a km) - Length 1,522 miles (2,450 km) - % water 41. ...

In the first census, 1790, the mean population center was located a little under 8 miles (13 km) west, and slightly north, of Chestertown, Maryland, a few feet from a small branch of the Chesapeake Bay called Stavely Pond. Oddly enough, the spot is on the "Great Oak Mannour" property patented to Gov. Josias Fendall (ca. 1628-1687) in the mid-1600s, one of Kent County's oldest and largest land grants. The patent was for 2000 acres (8 km²). Fendall was the 4th proprietary governor of Maryland from 1656-1660. High Street in Chestertown Chestertown is a town located in Kent County, Maryland. ... The Chesapeake Bay - Landsat photo The Chesapeake Bay where the Susquehanna River empties into it. ...

In 1800, the mean population center leaped across the Bay to a spot just east of today's Glenelg, Maryland. Glenelg is a town in Howard County, Maryland, of a few thousand people. ...

Although the mean population centers between 1820 and 1860 were located in what is present day West Virginia (having split from Virginia in 1862); at the time, these population centers would have been located in Virginia. Official language(s) English Capital Charleston Largest city Charleston Area Ranked 41st - Total 24,244 sq mi (62,809 kmÂ²) - Width 130 miles (210 km) - Length 240 miles (385 km) - % water 0. ... Official language(s) English Capital Richmond Largest city Virginia Beach Area Ranked 35th - Total 42,793 sq mi (110,862 kmÂ²) - Width 200 miles (320 km) - Length 430 miles (690 km) - % water 7. ...

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