APPORTIONMENT MAPS FOR SALE

    NOTES:
  1. Source of data: Data for historical apportionments collected from the appendix to:
    FAIR REPRESENTATION; Balinksi & Young, Yale Univesity Press, New Haven (1982). An update from 2001 is now available.
  2. 1910: The House was increased in size from 391 to 435. This also included one seat for the expected admission of AZ and NM in 1912.
  3. 1920: The House never implemented an apportionment following the 1920 Census. Data are included here for comparison and are from the Webster method which had been used for the 1910 Census. Included here is an additional map of the Change in Members from 1910 to 1930.
  4. 1920: For more on the congressional inaction following the 1920 census, see:
    DEMOCRACY DELAYED; Eagles, University of Georgia Press, Athens (1990). "Any reapportionment based upon the 1920 census would give more congressional power to urban areas at the expense of rural areas. Rural representatives worried that the larger number of urban congressmen would then vote to repeal prohibition and immigration restriction legislation, two measures seen as protecting traditional rural America's way of life. Rural representatives made innumerable invidious comparisons of urban and rural ways of life, and they frequently fired stinging attacks at urban inhabitants and the evils they seemed to embody. The urban-rural conflict over reapportionment was a manifestation primarily of rural resentment of urban growth and dominance; urban representatives seldom engaged in any overt verbal attackes on rural America." (p. 118-119)
  5. 1950: The House was temporarily increased to 437 (one seat each) for the late-decade admissions of AK and HI in 1959.

CONGRESSIONAL APPORTIONMENT SUMMARY TABLE

Census Seats States App. Pop Avg. Pop. Seats Shifted Gainers/Losers Biggest Gainers Biggest Losers
1900 357 45 74,562,608 208,859 n/a n/a n/a n/a
1910 391 46 91,072,117 232,921 44 seats 27 gainers; 0 losers NY +6; PA +4; CA +3 no losers
1920 435 48 105,210,729 241,864 12 seats 8 gainers; 11 losers CA +3; MI +2; OH +2 MO -2
1930 435 48 122,093,455 280,675 16 seats 8 gainers; 14 losers CA +6; MI +2; NY +2; TX +2 PA -2; GA -2
1940 435 48 131,006,184 301,164 9 seats 7 gainers; 9 losers CA +3 9 lost 1 seat
1950 435 48 149,895,183 344,587 14 seats 7 gainers; 9 losers CA +7; FL +2 PA -3; NY -2; MO -2; OK -2
1960 435 50 178,559,219 410,481 19 seats 8 gainers; 16 losers CA +8; FL +4 PA -3; NY -2; MA -2; AR -2
1970 435 50 204,053,325 469,088 11 seats 5 gainers; 9 losers CA +5; FL +3 PA -2; NY -2
1980 435 50 225,867,174 519,235 17 seats 11 gainers; 10 losers FL +4; TX +3; CA +2 NY - 5; PA -2; OH -2; IL -2
1990 435 50 249,022,783 572,466 19 seats 8 gainers; 13 losers CA +7; FL +4; TX +3 Ny -3; PA -2; OH -2; MI -2; IL -2
2000 435 50 281,424,177 646,952 12 seats 8 gainers; 10 losers GA +2; FL +2; TX +2; AZ +2 NY -2; PA -2
2010 435 50 309,183,463 710,767 12 seats 8 gainers, 10 losers TX +4; FL +2 NY -2;OH -2

    NOTES:
  1. App. Pop.: The national total of Apportionment Population, this may include overseas population for some years. This does not include D.C.
  2. Avg. Pop.: The simple arithmetic average of the App. Pop. divided by the Seats. This does not include D.C. and does not equal the actual average population per member based upon the districting phase of the apportionment proces as overseas population are not districted.
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