Population Characteristics - Population (2010 - 2020) To resort data: click column headings. To download data: click here. Name Change (%) Rank Change (%) Population 2010 Population 2020 Change (Number) Utah 1 17.6% 2,763,885 3,249,879 485,994 Texas 2 16.8% 25,145,561 29,360,759 4,215,198 Idaho 3 16.5% 1,567,582 1,826,913 259,331 Nevada 4 16.2% 2,700,551 3,138,259 437,708 Arizona 5 16.1% 6,392,017 7,421,401 1,029,384 Florida 6 15.6% 18,801,310 21,733,312 2,932,002 Colorado 7 15.5% 5,029,196 5,807,719 778,523 Washington 8 14.4% 6,724,540 7,693,612 969,072 North Dakota 9 13.8% 672,591 765,309 92,718 South Carolina 10 12.8% 4,625,364 5,218,040 592,676 North Carolina 11 11.2% 9,535,483 10,600,823 1,065,340 Oregon 12 10.7% 3,831,074 4,241,507 410,433 Georgia 13 10.6% 9,687,653 10,710,017 1,022,364 Delaware 14 9.9% 897,934 986,809 88,875 South Dakota 15 9.6% 814,180 892,717 78,537 Montana 16 9.2% 989,415 1,080,577 91,162 Tennessee 17 8.5% 6,346,105 6,886,834 540,729 Virginia 18 7.4% 8,001,024 8,590,563 589,539 Minnesota 19 6.7% 5,303,925 5,657,342 353,417 Oklahoma 20 6.1% 3,751,351 3,980,783 229,432 Nebraska 21 6.1% 1,826,341 1,937,552 111,211 California 22 5.7% 37,253,956 39,368,078 2,114,122 Massachusetts 23 5.3% 6,547,629 6,893,574 345,945 Maryland 24 4.9% 5,773,552 6,055,802 282,250 Indiana 25 4.2% 6,483,802 6,754,953 271,151 Arkansas 26 3.9% 2,915,918 3,030,522 114,604 Iowa 27 3.8% 3,046,355 3,163,561 117,206 New Hampshire 28 3.8% 1,316,470 1,366,275 49,805 Hawaii 29 3.4% 1,360,301 1,407,006 46,705 Wyoming 30 3.3% 563,626 582,328 18,702 Kentucky 31 3.2% 4,339,367 4,477,251 137,884 Alabama 32 3.0% 4,779,736 4,921,532 141,796 Alaska 33 2.9% 710,231 731,158 20,927 Missouri 34 2.7% 5,988,927 6,151,548 162,621 Wisconsin 35 2.6% 5,686,986 5,832,655 145,669 Louisiana 36 2.5% 4,533,372 4,645,318 111,946 New Mexico 37 2.3% 2,059,179 2,106,319 47,140 Kansas 38 2.1% 2,853,118 2,913,805 60,687 Maine 39 1.6% 1,328,361 1,350,141 21,780 Ohio 40 1.4% 11,536,504 11,693,217 156,713 New Jersey 41 1.0% 8,791,894 8,882,371 90,477 Michigan 42 0.8% 9,883,640 9,966,555 82,915 Pennsylvania 43 0.6% 12,702,379 12,783,254 80,875 Rhode Island 44 0.4% 1,052,567 1,057,125 4,558 Mississippi 45 0.0% 2,967,297 2,966,786 -511 New York 46 -0.2% 19,378,102 19,336,776 -41,326 Vermont 47 -0.4% 625,741 623,347 -2,394 Connecticut 48 -0.5% 3,574,097 3,557,006 -17,091 Illinois 49 -1.9% 12,830,632 12,587,530 -243,102 West Virginia 50 -3.7% 1,852,994 1,784,787 -68,207 Source: 1970 & 1980: U.S. Bureau of the Census, County Population Census Counts, (http://www.census.gov/population/www/censusdata/cencounts.html); 2001-2009, 2011-2020: U.S. Bureau of the Census, Population Estimates Program, (http://www.census.gov/popest/); 1990, 2000, 2010: U.S. Bureau of the Census, Explore Census Data, (https://data.census.gov/cedsci/); DATE LAST UPDATED: May 12, 2021.