Table 1.  The Most Populous Counties and Incorporated Places in 2010 in the United States:  2000 and 2010
(For information on confidentiality protection, nonsampling error, and definitions, see http://www.census.gov/prod/cen2010/pl94-171.pdf)
Population rank				Population		Change, 2000 to 2010
2010	2000		Geographic area	2000 1	2010	Number	Percent
			United States……...……………………………………………….	281 421 906	308 745 538	27 323 632	9.7
			COUNTY
1	1		Los Angeles County, CA……………………………………..	9 519 338	9 818 605	299 267	3.1
2	2		Cook County, IL………………………………………………..	5 376 741	5 194 675	- 182 066	-3.4
3	3		Harris County, TX……………………………………………….	3 400 578	4 092 459	691 881	20.3
4	4		Maricopa County, AZ……………………………………………	3 072 149	3 817 117	744 968	24.2
5	6		San Diego County, CA………………………………………..	2 813 833	3 095 313	281 480	10.0
6	5		Orange County, CA……………………………………………	2 846 289	3 010 232	163 943	5.8
7	7		Kings County, NY……………………………………………….	2 465 326	2 504 700	39 374	1.6
8	8		Miami-Dade County, FL………………………………………….	2 253 362	2 496 435	243 073	10.8
9	10		Dallas County, TX……………………………………………….	2 218 899	2 368 139	149 240	6.7
10	9		Queens County, NY…………………………………………….	2 229 379	2 230 722	1 343	0.1
11	16		Riverside County, CA…………………………………………….	1 545 387	2 189 641	644 254	41.7
12	13		San Bernardino County, CA…………………………………….	1 709 434	2 035 210	325 776	19.1
13	25		Clark County, NV……………………………………………..	1 375 765	1 951 269	575 504	41.8
14	12		King County, WA……………………………………………..	1 737 034	1 931 249	194 215	11.2
15	11		Wayne County, MI…………………………………………….	2 061 162	1 820 584	- 240 578	-11.7
16	20		Tarrant County, TX………………………………………………	1 446 219	1 809 034	362 815	25.1
17	14		Santa Clara County, CA…………………………………………	1 682 585	1 781 642	99 057	5.9
18	15		Broward County, FL………………………………………………	1 623 018	1 748 066	125 048	7.7
19	24		Bexar County, TX………………………………………………	1 392 931	1 714 773	321 842	23.1
20	17		New York County, NY………………………………………..	1 537 195	1 585 873	48 678	3.2
			INCORPORATED PLACE
1	1		New York city, NY……………………………………………	8 008 278	8 175 133	166 855	2.1
2	2		Los Angeles city, CA…………………………………………..	3 694 820	3 792 621	97 801	2.6
3	3		Chicago city, IL………………………………...……………..	2 896 016	2 695 598	- 200 418	-6.9
4	4		Houston city, TX……………………………………………….	1 953 631	2 099 451	145 820	7.5
5	5		Philadelphia city, PA……………………………………………………	1 517 550	1 526 006	8 456	0.6
6	6		Phoenix city, AZ………………………………………………..	1 321 045	1 445 632	124 587	9.4
7	9		San Antonio city, TX……………………………………………..	1 144 646	1 327 407	182 761	16.0
8	7		San Diego city, CA………………………………………………….	1 223 400	1 307 402	84 002	6.9
9	8		Dallas city, TX…………………………………………………..	1 188 580	1 197 816	9 236	0.8
10	11		San Jose city, CA………………………………………………….	894 943	945 942	50 999	5.7
11	12		Indianapolis city, IN……………………………………………….	791 926	829 718	37 792	4.8
12	14		Jacksonville city, FL……………………………………………….	735 617	821 784	86 167	11.7
13	13		San Francisco city, CA…………………………………………	776 733	805 235	28 502	3.7
14	16		Austin city, TX…………………………………………………	656 562	790 390	133 828	20.4
15	15		Columbus city, OH………………………………………………….	711 470	787 033	75 563	10.6
16	27		Fort Worth city, TX……………………………………………..	534 694	741 206	206 512	38.6
17	66		Louisville/Jefferson County metro government, KY 2…………	256 231	741 096	484 865	189.2
18	26		Charlotte city, NC……………………..………………………	540 828	731 424	190 596	35.2
19	10		Detroit city, MI………………………………………………….	951 270	713 777	- 237 493	-25.0
20	23		El Paso city, TX………………………………………………	563 662	649 121	85 459	15.2
1 Census 2000 counts are as published in Census 2000 reports and thus do not include any changes published subsequently due to boundary changes or to the Count Question Resolution program.
2 Louisville city and Jefferson County, Kentucky formed a consolidated government after Census 2000.  The 2000 population for the incorporated place of Louisville city is before consolidation.
Source:  U.S. Census Bureau, Census 2000 Summary File 1, Table P1, and 2010 Census National Summary File of Redistricting Data, Table P1.