A hundred years ago, Wisconsin had 11 members in the U.S. House of Representatives.
After the 1930 Census, it dropped to 10.
After the 1970 Census, it dropped to nine.
After the 2000 Census, it dropped to eight.
And after the 2030 Census, there is a good chance it will drop to seven.
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Losing another House seat would have a lot of spin-off effects for Wisconsin. It would mean less of a voice in Congress. It would mean a slightly diminished role in picking presidents, since the nation’s most persistently close presidential battleground would lose an Electoral College vote.
But most dramatically, it would scramble the state’s congressional lines. When a state loses a House seat, most of the remaining districts have to get substantially bigger. And that means a very different map.
Would the new districts be more competitive or less competitive? How many would tilt toward the Republicans? How many would tilt toward the Democrats?
The last time Wisconsin lost a seat – in the early 2000s – it meant that the state’s biggest city, Milwaukee, no longer anchored two congressional districts, as it had for decades. Two Milwaukee seats became one. In effect, Democrats lost a seat.
Which party will “lose” if Wisconsin drops to seven seats is difficult to know more than six years out. Republicans now hold six of Wisconsin’s eight House seats. It’s hard to imagine there could be six red seats under a seven-seat map, since Milwaukee and Madison are natural anchors for two blue seats.
But if Democrats in the next election or two can regain the western Wisconsin seat they’ve held in the past, that pickup could also be imperiled by a new map.
It’s very hypothetical at this point. Reapportionment won’t take effect until the 2032 election, and the loss of a Wisconsin congressional seat is not a certainty.
In fact, Wisconsin is on the bubble according to some projections, meaning it could keep its eighth seat under a slightly different set of population trends.
It all depends on population changes in the 50 states over the rest of the decade, and how they’re reflected in the 2030 Census count.
After every 10-year Census, the 435 House seats are reapportioned to reflect the latest state-by-state population numbers (counting all residents, citizens and non-citizens alike). States that have grown the fastest gain seats; states that have grown more slowly or have lost population lose seats.
For decades, that has resulted in ever fewer seats in the northeastern and Great Lakes states and ever more seats in higher-growth southern and western states.
New York state peaked at 45 House seats in the middle of the last century and now has 26. Ohio had 24 seats in the 1960s and now has 15. Florida has gone from eight seats in the 1950s to 28 today. Texas has gone from 24 in the 1970s to 38 today.
Wisconsin has been growing more slowly than the nation for a long time now, which explains its slowly shrinking congressional delegation. The last Census in 2020 measured the state’s growth over the previous decade at 3.6% – higher than some nearby states but less than half the national rate.
Projections now forecast Wisconsin losing a congressional seat, but there is a scenario for holding on to one
The recent release by the Census Bureau of 2025 population data has led to a fresh batch of reapportionment projections by different experts and analysts.
Right now, those forecasts show Wisconsin going from eight House seats to seven. But at least one estimate shows Wisconsin losing that seat by a very narrow margin.One of the wild cards in these forecasts is the impact of President Donald Trump’s deportation campaign and crackdown on the border. Immigration from other countries has been a huge component of population growth in many places.In Florida, for example, 90% of the growth from 2024 to 2025 was from immigration, not people moving there from other states.So, in one reapportionment estimate by the Brennan Center for Justice, a scenario of “zero” U.S. population growth due to immigration over the next four years would lower Florida’s expected reapportionment gain from three House seats to two.
And Wisconsin, a state that attracts far fewer immigrants, “would keep a seat that it’s currently projected to lose,” according to the group.
How losing a seat would harm Wisconsin’s clout in Congress
But let’s say Wisconsin does lose a congressional seat after the 2032 election. What would the harm be to the state?
It would mean a little less clout in Congress, where Wisconsin would have one fewer vote on the House floor and less representation on House committees. This is a tangible consequence, but it may not be as big a blow as losing a congressional seat has been in the past.
That’s because committees are less central to the way Congress works than they used to be. In earlier decades, having seats on powerful committees gave a state the chance to shape legislation in its favor.
Committee chairs from Wisconsin had real power and influence, such as Democrat Dave Obey on Appropriations in the 1990s and 2000s, Republican Paul Ryan on Ways and Means in the 2010s, or Democrat Les Aspin on Armed Services in the 1980s and early 1990s.
But over the years, both parties have dramatically weakened the committee system. More than ever, House legislation is dictated, top-down, by congressional leaders and the White House (if the president’s party controls the chamber), not by key committees or powerful chairs.
Losing an Electoral College vote could alter the national map
A second consequence of losing a seat would be the loss of an Electoral College vote. Wisconsin would go from having 10 electoral votes (one for each House member and senator) down to nine.
Wisconsin will remain a key battleground as long as it remains one of America’s few purple states. But reapportionment will change the electoral math for both parties.
Current estimates have states that voted for Republican Donald Trump in 2024 gaining 10 electoral votes after 2030, and states that voted for Democrat Kamala Harris losing 10. (The biggest single projected loser right now is California, which is forecast to lose four House seats and four electoral votes).
Under these projections, the so-called Blue Wall states of Wisconsin, Michigan and Pennsylvania would not be enough by themselves to put Democrats over the top in the Electoral College. Another battleground in the South, such as Georgia or Arizona, would be required.
And what about the state’s congressional map? The basic outlines of that map haven’t changed dramatically since 2002. There have been important tweaks to the lines, but the regional orientation of the districts is largely the same.
Right now, however, there are two ways that could change. The current map faces legal challenges that could, in theory, result in very different districts before the 2030 Census. This may not be likely, but it is possible.Then there’s reapportionment, which means new districts in six years no matter what happens before then.
Even if Wisconsin keeps its eighth seat, a future Legislature and governor and set of courts will fashion new districts based on 10 years of population change.
And if it loses that seat, those changes will be all the more significant.
There are lots of moving parts here, making it impossible to predict what the state’s future House districts will look like, how competitive they will be and how tilted they will be in a red or blue direction.
But there is a pretty good chance that in the coming years, Wisconsin’s congressional map will see its biggest changes in decades.
Craig Gilbert provides Wisconsin political analysis as a fellow with Marquette University Law School’s Lubar Center for Public Policy Research and Civic Education. Prior to the fellowship, Gilbert reported on politics for 35 years at the Journal Sentinel, the last 25 in its Washington Bureau. His column continues that independent reporting tradition and goes through the established Journal Sentinel editing process.
Follow him on Twitter: @Wisvoter.
This article originally appeared on Milwaukee Journal Sentinel: Will Wisconsin maintain 8 congressional districts? | Gilbert
