Reapportionment changes from 1960-2010

Over the past six reapportionments, 61 seats shifted from the Northeast and Midwest to the South and West.

The Losers


The Northeast region lost 30 seats from 1960 through the 2010 reapportionment. The region’s losses were concentrated in the mid-Atlantic states of New York (-14), Pennsylvania (-9), and New Jersey (-3) with New England states accounting for four more. Not a single state in the northeast has netted a seat in the past 50 years.


The Midwest lost 31 seats since 1960. The bulk of those losses came from Ohio (-8), Illinois (-6), and Michigan (-5). Like the Northeast, none of the 12 states in the Midwest have netted seats.

The Gainers


The southern region has not experienced one trend unlike the Midwest and Northeast. Southern Congressional seat gains have been concentrated along the Atlantic coast where Florida, Georgia (+4), North Carolina (+2), South Carolina (+1), and Virginia (+1) have been responsible for 23 of the region’s 28 net seats. Texas has gained 13 seats since 1960 (3rd nationally to Florida and California over the same period). Six Southern states have lost seats over the same period. They are Alabama (-1), Kentucky (-1), Louisiana (-2), Mississippi (-1), Oklahoma (-1), and West Virginia (-2).

Another way to look at the South region is that Florida and Texas make up the entire net growth of the region with the gains and losses elsewhere cancelling each other out.


The greatest beneficiary of recent population trends is the West region. Unlike the South where two states represent the region’s growth the West has had eight states gain seats and six of those eight gaining multiple ones. The growth in some states has been exponential: Nevada has quadrupled from 1 to 4 seats, Arizona has tripled from 3 to 9, and Utah has doubled from 2 to 4. California’s 15 seat increase ties Florida for the most growth by any state.


Biggest Gainers

The top five growth states since 1960 are California, Florida, Texas, Arizona, and Georgia.

State Net Seat Gain
Calif. +15
Fla. +15
Texas +13
Ariz. +6
Ga. +4

Biggest Losers

New York, Pennsylvania, Ohio, Illinois, and Michigan have lost the most seats since 1960.

State Net Seat Loss
N.Y. -14
Pa. -9
Ohio -8
Ill. -6
Mich. -5

If Our 2019 Apportionment Projections Hold

Fair Lines America Foundation’s 2020 Apportionment Projections anticipate a continuation of the half-century trend. The South stands to gain another four seats and the West could pick up three. The Northeast is projected to shed three more with one coming out of New England and two from the mid-Atlantic. The Midwest could end up the biggest loser this decade with a four- seat loss.

Those results would reshuffle the long-term standing of states with the highest gains and largest losses.

State Net Seat Gain
Fla. +17
Texas +16
Calif. +14
Ariz. +7
Ga. +4
State Net Seat Loss
N.Y. -15
Pa. -10
Ohio -9
Ill. -7
Mich. -6