Apportionment is the process of dividing the 435 memberships, or seats, in the House of Representatives among the 50 states based on the population figures collected during the decennial census.

State or Region	2020 Census	2010 Census	2000 Census	1990 Census	1980 Census	1970 Census	1960 Census ¹	1950 Census	1940 Census	1930 Census	1920 Census ²	1910 Census ³
X Not applicable. Represents date prior to becoming a state. Note 1: Apportionment is the process of dividing up the number of representatives (or seats) in the U.S. House of Representatives among the 50 states. The District of Columbia and Puerto Rico are not included. Note 2: The values for the "United States" that are shown in the "Change in Seats" row indicate the total number of seats that were reassigned that decade (except for the 1910 value, which indicates the number of seats added to the U.S. House of Representatives since 1900). ¹ In 1959, Alaska and Hawaii became states and were each granted a seat—temporarily increasing the size of the House to 437. The size of the House for the 1960 apportionment reverted back to the fixed size of 435 seats. ² In 1912, Arizona and New Mexico became states and each were granted a seat—temporarily increasing the size of the House to 435. In 1920, the Census Bureau did transmit apportionment counts to Congress, but Congress did not reapportion. The size of the House during the next apportionment, in 1930, was fixed at 435. ³ In 1900, there were 386 seats in the House. In 1907, Oklahoma became a state and was granted 5 seats—temporarily increasing the size of the House to 391. The size of the House during the next apportionment, in 1910, was increased to 433.
United States
Number of Seats	435	435	435	435	435	435	435	435	435	435	435	433
Change in Seats	7	12	12	19	17	11	21	14	9	27	0	47
Average Population Per Seat	761,169	710,767	646,952	572,466	519,235	469,088	410,481	344,587	301,164	280,675	241,864	210,328
Alabama
Number of Seats	7	7	7	7	7	7	8	9	9	9	10	10
Change in Seats	0	0	0	0	0	-1	-1	0	0	-1	0	1
Average Population Per Seat	718,579	686,140	637,304	580,373	555,723	496,555	408,343	340,194	314,773	294,027	234,817	213,809
Alaska
Number of Seats	1	1	1	1	1	1	1	X	X	X	X	X
Change in Seats	0	0	0	0	0	0	1	X	X	X	X	X
Average Population Per Seat	736,081	721,523	628,933	551,947	400,481	304,067	226,167	X	X	X	X	X
Arizona
Number of Seats	9	9	8	6	5	4	3	2	2	1	1	X
Change in Seats	0	1	2	1	1	1	1	0	1	1	1	X
Average Population Per Seat	795,436	712,522	642,585	612,998	543,573	446,905	434,054	374,794	249,631	389,375	309,495	X
Arkansas
Number of Seats	4	4	4	4	4	4	4	6	7	7	7	7
Change in Seats	0	0	0	0	0	0	-2	-1	0	0	0	0
Average Population Per Seat	753,439	731,557	669,933	590,560	571,378	485,576	446,568	318,252	278,484	264,921	250,315	224,921
California
Number of Seats	52	53	53	52	45	43	38	30	23	20	11	11
Change in Seats	-1	0	1	7	2	5	8	7	3	9	0	3
Average Population Per Seat	761,091	704,566	640,204	573,832	525,968	467,415	413,611	352,874	300,321	283,412	311,457	216,051
Colorado
Number of Seats	8	7	7	6	6	5	4	4	4	4	4	4
Change in Seats	1	0	1	0	1	1	0	0	0	0	0	1
Average Population Per Seat	722,771	720,704	615,983	551,319	481,472	445,354	438,487	331,272	280,824	258,712	234,790	199,643
Connecticut
Number of Seats	5	5	5	6	6	6	6	6	6	6	5	5
Change in Seats	0	0	-1	0	0	0	0	0	0	1	0	0
Average Population Per Seat	721,660	716,326	681,907	549,278	517,929	508,449	422,539	334,547	284,874	267,816	276,126	222,951
Delaware
Number of Seats	1	1	1	1	1	1	1	1	1	1	1	1
Change in Seats	0	0	0	0	0	0	0	0	0	0	0	0
Average Population Per Seat	990,837	900,877	785,068	668,696	595,225	551,928	446,292	318,085	266,505	238,380	223,003	202,322
Florida
Number of Seats	28	27	25	23	19	15	12	8	6	5	4	4
Change in Seats	1	2	2	4	4	3	4	2	1	1	0	1
Average Population Per Seat	770,376	700,029	641,156	565,364	512,631	457,047	412,630	346,413	316,236	293,638	242,118	188,155
Georgia
Number of Seats	14	14	13	11	10	10	10	10	10	10	12	12
Change in Seats	0	1	2	1	0	0	0	0	0	-2	0	1
Average Population Per Seat	766,091	694,826	631,306	591,674	546,427	462,731	394,312	344,458	312,372	290,845	241,319	217,427
Hawaii
Number of Seats	2	2	2	2	2	2	2	X	X	X	X	X
Change in Seats	0	0	0	0	0	0	2	X	X	X	X	X
Average Population Per Seat	730,069	683,431	608,321	557,637	482,500	392,451	316,386	X	X	X	X	X
Idaho
Number of Seats	2	2	2	2	2	2	2	2	2	2	2	2
Change in Seats	0	0	0	0	0	0	0	0	0	0	0	1
Average Population Per Seat	920,689	786,750	648,637	505,993	471,968	359,961	333,596	294,319	262,437	220,768	215,221	161,720
Illinois
Number of Seats	17	18	19	20	22	24	24	25	26	27	27	27
Change in Seats	-1	-1	-1	-2	-2	0	-1	-1	-1	0	0	2
Average Population Per Seat	754,279	714,688	654,686	573,334	519,021	466,013	420,048	348,487	303,740	282,607	240,196	208,837
Indiana
Number of Seats	9	9	9	10	10	11	11	11	11	12	13	13
Change in Seats	0	0	-1	0	-1	0	0	0	-1	-1	0	0
Average Population Per Seat	754,476	722,398	676,754	556,423	549,018	475,287	423,863	357,657	311,618	269,873	225,415	207,760
Iowa
Number of Seats	4	4	5	5	6	6	7	8	8	9	11	11
Change in Seats	0	-1	0	-1	0	-1	-1	0	-1	-2	0	0
Average Population Per Seat	798,102	763,447	586,385	557,485	485,565	474,487	393,934	327,634	317,284	274,491	218,547	202,252
Kansas
Number of Seats	4	4	4	4	5	5	5	6	6	7	8	8
Change in Seats	0	0	0	-1	0	0	-1	0	-1	-1	0	0
Average Population Per Seat	735,216	715,953	673,456	621,400	472,642	453,169	435,722	317,550	300,171	268,500	221,157	211,369
Kentucky
Number of Seats	6	6	6	6	7	7	7	8	9	9	11	11
Change in Seats	0	0	0	-1	0	0	-1	-1	0	-2	0	0
Average Population Per Seat	751,557	725,101	674,905	616,495	523,062	463,783	434,022	368,101	316,181	290,508	219,694	208,173
Louisiana
Number of Seats	6	6	7	7	8	8	8	8	8	8	8	8
Change in Seats	0	-1	0	-1	0	0	0	0	0	0	0	1
Average Population Per Seat	776,911	758,994	640,039	605,459	525,497	459,001	407,128	335,440	295,485	262,699	224,814	207,049
Maine
Number of Seats	2	2	2	2	2	2	2	3	3	3	4	4
Change in Seats	0	0	0	0	0	0	-1	0	0	-1	0	0
Average Population Per Seat	681,791	666,537	638,866	616,612	562,330	503,160	484,633	304,591	282,409	265,806	192,004	185,593
Maryland
Number of Seats	8	8	8	8	8	8	8	7	6	6	6	6
Change in Seats	0	0	0	0	0	0	1	1	0	0	0	0
Average Population Per Seat	773,160	723,741	663,486	599,828	527,056	494,212	387,586	334,714	303,541	271,920	241,610	215,891
Massachusetts
Number of Seats	9	9	10	10	11	12	12	14	14	15	16	16
Change in Seats	0	-1	0	-1	-1	0	-2	0	-1	-1	0	2
Average Population Per Seat	781,497	728,849	635,557	602,905	521,549	477,223	429,048	335,037	308,337	283,307	240,772	210,401
Michigan
Number of Seats	13	14	15	16	18	19	19	18	17	17	13	13
Change in Seats	-1	-1	-1	-2	-1	0	1	1	0	4	0	1
Average Population Per Seat	775,726	707,973	663,722	583,049	514,352	470,379	411,747	353,987	309,183	284,827	282,186	216,167
Minnesota
Number of Seats	8	8	8	8	8	8	8	9	9	9	10	10
Change in Seats	0	0	0	0	0	0	-1	0	0	-1	0	1
Average Population Per Seat	713,719	664,360	615,709	548,379	509,644	479,147	426,733	331,387	310,256	283,509	238,566	207,438
Mississippi
Number of Seats	4	4	4	5	5	5	5	6	7	7	8	8
Change in Seats	0	0	-1	0	0	0	-1	-1	0	-1	0	0
Average Population Per Seat	740,979	744,560	713,232	517,289	504,128	446,770	435,628	363,152	311,971	286,879	223,827	224,639
Missouri
Number of Seats	8	8	9	9	9	10	10	11	13	13	16	16
Change in Seats	0	-1	0	0	-1	0	-1	-2	0	-3	0	0
Average Population Per Seat	770,035	751,435	622,918	570,867	546,383	471,803	431,981	359,514	291,128	279,162	212,753	205,833
Montana
Number of Seats	2	1	1	1	2	2	2	2	2	2	2	2
Change in Seats	1	0	0	-1	0	0	0	0	0	0	0	1
Average Population Per Seat	542,704	994,416	905,316	803,655	393,345	350,787	337,384	295,512	279,728	262,365	270,756	183,169
Nebraska
Number of Seats	3	3	3	3	3	3	3	4	4	5	6	6
Change in Seats	0	0	0	0	0	0	-1	0	-1	-1	0	0
Average Population Per Seat	654,444	610,608	571,790	528,206	523,335	498,940	470,443	331,378	328,959	275,025	216,062	198,702
Nevada
Number of Seats	4	4	3	2	2	1	1	1	1	1	1	1
Change in Seats	0	1	1	0	1	0	0	0	0	0	0	0
Average Population Per Seat	777,116	677,358	667,344	603,076	399,592	492,396	285,278	160,083	110,247	86,390	75,820	80,293
New Hampshire
Number of Seats	2	2	2	2	2	2	2	2	2	2	2	2
Change in Seats	0	0	0	0	0	0	0	0	0	0	0	0
Average Population Per Seat	689,545	660,723	619,208	556,958	460,305	373,142	303,461	266,621	245,762	232,646	221,542	215,286
New Jersey
Number of Seats	12	12	13	13	14	15	15	14	14	14	12	12
Change in Seats	0	-1	0	-1	-1	0	1	0	0	2	0	2
Average Population Per Seat	774,541	733,958	648,027	596,049	526,011	480,536	404,452	345,381	297,155	288,666	262,992	211,431
New Mexico
Number of Seats	3	3	3	3	3	2	2	2	2	1	1	X
Change in Seats	0	0	0	0	1	0	0	0	1	1	1	X
Average Population Per Seat	706,740	689,091	607,940	507,260	433,323	513,332	475,512	340,594	265,909	395,982	353,428	X
New York
Number of Seats	26	27	29	31	34	39	41	43	45	45	43	43
Change in Seats	-1	-2	-2	-3	-5	-2	-2	-2	0	2	0	6
Average Population Per Seat	777,529	719,298	655,344	582,081	516,391	470,207	409,324	344,888	299,536	279,733	241,409	211,836
North Carolina
Number of Seats	14	13	13	12	11	11	11	12	12	11	10	10
Change in Seats	1	0	1	1	0	0	-1	0	1	1	0	0
Average Population Per Seat	746,711	735,829	620,590	554,803	534,039	465,930	414,196	338,494	297,635	287,934	255,912	220,629
North Dakota
Number of Seats	1	1	1	1	1	1	2	2	2	2	3	3
Change in Seats	0	0	0	0	0	-1	0	0	0	-1	0	1
Average Population Per Seat	779,702	675,905	643,756	641,364	652,695	624,181	316,223	309,818	320,968	336,670	214,651	191,468
Ohio
Number of Seats	15	16	18	19	21	23	24	23	23	24	22	22
Change in Seats	-1	-2	-1	-2	-2	-1	1	0	-1	2	0	1
Average Population Per Seat	787,257	723,031	631,919	573,017	514,163	466,530	404,433	345,506	300,331	276,943	261,791	216,687
Oklahoma
Number of Seats	5	5	5	6	6	6	6	6	8	9	8	8
Change in Seats	0	0	-1	0	0	0	0	-2	-1	1	0	8
Average Population Per Seat	792,703	752,976	691,764	526,267	504,211	430,914	388,047	372,225	292,054	264,691	253,535	207,144
Oregon
Number of Seats	6	5	5	5	5	4	4	4	4	3	3	3
Change in Seats	1	0	0	0	1	0	0	0	1	0	0	1
Average Population Per Seat	706,917	769,721	685,709	570,747	526,533	527,703	442,172	380,335	272,421	316,793	261,130	224,255
Pennsylvania
Number of Seats	17	18	19	21	23	25	27	30	33	34	36	36
Change in Seats	-1	-1	-2	-2	-2	-2	-3	-3	-1	-2	0	4
Average Population Per Seat	765,403	707,495	647,404	567,843	515,945	475,373	419,236	349,934	300,005	283,274	242,223	212,920
Rhode Island
Number of Seats	2	2	2	2	2	2	2	2	2	2	3	3
Change in Seats	0	0	0	0	0	0	0	0	0	-1	0	1
Average Population Per Seat	549,082	527,624	524,831	502,992	473,577	478,899	429,744	395,948	356,673	343,749	201,466	180,870
South Carolina
Number of Seats	7	7	6	6	6	6	6	6	6	6	7	7
Change in Seats	0	1	0	0	0	0	0	0	0	-1	0	0
Average Population Per Seat	732,102	663,711	670,844	584,285	519,868	436,220	397,099	352,838	316,634	289,793	240,532	216,486
South Dakota
Number of Seats	1	1	1	1	1	2	2	2	2	2	3	3
Change in Seats	0	0	0	0	-1	0	0	0	0	-1	0	1
Average Population Per Seat	887,770	819,761	756,874	699,999	690,178	336,624	340,257	326,370	321,481	336,503	210,413	191,892
Tennessee
Number of Seats	9	9	9	9	9	8	9	9	10	9	10	10
Change in Seats	0	0	0	0	1	-1	0	-1	1	-1	0	0
Average Population Per Seat	768,544	708,381	633,337	544,071	510,083	495,133	396,343	365,746	291,584	290,722	233,789	218,479
Texas
Number of Seats	38	36	32	30	27	24	23	22	21	21	18	18
Change in Seats	2	4	2	3	3	1	1	1	0	3	0	2
Average Population Per Seat	767,981	701,901	653,250	568,660	526,977	470,783	416,508	350,509	305,468	277,362	259,068	216,475
Utah
Number of Seats	4	4	3	3	3	2	2	2	2	2	2	2
Change in Seats	0	1	0	0	1	0	0	0	0	0	0	1
Average Population Per Seat	818,813	692,691	745,571	575,928	487,012	533,905	445,314	344,431	275,155	252,871	224,194	185,932
Vermont
Number of Seats	1	1	1	1	1	1	1	1	1	1	2	2
Change in Seats	0	0	0	0	0	0	0	0	0	-1	0	0
Average Population Per Seat	643,503	630,337	609,890	564,964	511,456	448,327	389,881	377,747	359,231	359,611	176,214	177,978
Virginia
Number of Seats	11	11	11	11	10	10	10	10	9	9	10	10
Change in Seats	0	0	0	1	0	0	0	1	0	-1	0	0
Average Population Per Seat	786,777	730,703	645,518	565,143	534,628	469,074	396,695	331,868	297,530	269,092	230,919	206,161
Washington
Number of Seats	10	10	9	9	8	7	7	7	6	6	5	5
Change in Seats	0	1	0	1	1	0	0	1	0	1	0	2
Average Population Per Seat	771,595	675,337	656,520	543,105	516,270	491,927	407,602	339,852	289,365	258,737	270,919	228,027
West Virginia
Number of Seats	2	3	3	3	4	4	5	6	6	6	6	6
Change in Seats	-1	0	0	-1	0	-1	-1	0	0	0	0	1
Average Population Per Seat	897,523	619,938	604,359	600,542	487,411	440,833	372,084	334,259	316,996	288,200	243,950	203,520
Wisconsin
Number of Seats	8	8	8	9	9	9	10	10	10	10	11	11
Change in Seats	0	0	-1	0	0	-1	0	0	0	-1	0	0
Average Population Per Seat	737,184	712,279	671,401	545,194	522,815	494,113	395,178	343,458	313,759	293,172	239,210	212,078
Wyoming
Number of Seats	1	1	1	1	1	1	1	1	1	1	1	1
Change in Seats	0	0	0	0	0	0	0	0	0	0	0	0
Average Population Per Seat	577,719	568,300	495,304	455,975	470,816	335,719	330,066	290,529	250,742	223,630	193,487	144,658