County Population Estimates: 2010-2011

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County Population Estimates: 2010-2011

UPDATE: View our newer map with more recent 2012 data.

Many counties have seen sizable swings in population since the 2010 Census.

Estimated changes in population, shown in the map below, occurred from April 2010 to July 2011. For some counties, recent poulation trends were much different than shifts experienced during the prior decade.

Much of the counties reporting the largest gains are in the southern and western regions of the U.S.

Harris County, Texas, gained an estimated 88,452 residents – the largest raw increase of any county. The county’s birth rate more than tripled its death rate, according to census data. Los Angeles County, Calif., added 70,451 residents – second only to Harris County.

The map below shows the fastest growing counties by percent change. Select and drag to pan the map or click a county to view detailed data.

Percent change since 2010 Census


< -1%	-0.1 to -1%	No Change	< +1%	+1 to 3%	> +3%

Counties with the largest raw population increase:

County	2011 Estimate	2010-2011 Change	Percent change
Harris County, Texas	4,180,894	88,452	2.2
Los Angeles County, California	9,889,056	70,451	0.7
Maricopa County, Arizona	3,880,244	63,127	1.7
Miami-Dade County, Florida	2,554,766	58,331	2.3
Riverside County, California	2,239,620	49,979	2.3
Dallas County, Texas	2,416,014	47,875	2.0
Orange County, California	3,055,745	45,513	1.5
San Diego County, California	3,140,069	44,756	1.4
Bexar County, Texas	1,756,153	41,376	2.4
Tarrant County, Texas	1,849,815	40,776	2.3
Travis County, Texas	1,063,130	38,858	3.8
Hillsborough County, Florida	1,267,775	38,549	3.1
King County, Washington	1,969,722	38,473	2.0
Broward County, Florida	1,780,172	32,106	1.8
San Bernardino County, California	2,065,377	30,167	1.5
Collin County, Texas	812,226	29,885	3.8
Fulton County, Georgia	949,599	29,016	3.2
Wake County, North Carolina	929,780	28,787	3.2
Kings County, New York	2,532,645	27,945	1.1
Santa Clara County, California	1,809,378	27,736	1.6

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