(DANE COUNTY, WISCONSIN) — Dane County added 8,600 residents between 2023 and 2024, with international immigration driving most of that growth even as newer statewide figures point to a sharp slowdown in arrivals from abroad.

The county’s population rose 1.5% during that period. International immigration accounted for about 5,900 net new residents from abroad, while domestic migration added 976.

Those figures place Dane County among the Wisconsin communities where international immigration played an outsize role in population change. They also set a benchmark for a period that ended before broader state trends shifted.

No specific 2024-2025 or 2025-2026 population data for Dane County is available in current Census releases. Statewide data, however, shows that Wisconsin’s net international migration dropped sharply after federal policy changes following President Trump’s January 2025 inauguration.

Wisconsin’s net international migration fell 67% to 7,200 residents in fiscal year 2025, down from over 22,000 the prior year. That decline still accounted for nearly half of the state’s overall 16,000 population gain, a 0.2% increase.

Across Wisconsin, nearly every county saw double-digit drops in net international inflows. Some counties posted net losses of international migrants, while a few recorded small gains, including 29 in Shawano County.

Those statewide changes matter for Dane County because immigration was the main driver of its 2023-2024 growth. Without updated county-level breakdowns, the county likely slowed in line with the state as international immigration weakened.

The numbers capture a sharp contrast between the most recent county snapshot and the broader direction of travel across Wisconsin. In Dane County, international immigration contributed about 5,900 net new residents from abroad in a single year, while statewide net international migration in fiscal year 2025 totaled 7,200 residents.

Domestic migration also helped lift Dane County’s population in 2023-2024, but on a much smaller scale. The county’s net gain of 976 residents from domestic migration was well below the increase tied to international immigration.

That split helps explain why shifts in international immigration carry unusual weight in Dane County. When the larger source of growth slows, the effect on county population gains can be immediate.

The statewide slowdown traces to several changes in the broader immigration system. Visa issuances dropped by 250,000 in the first eight months of 2025 compared with 2024.

Refugee admissions also fell by 60,000 in FY2025. At the same time, U.S.-Mexico border encounters reached 50-year lows.

Together, those changes reduced the number of people entering the country through several channels that feed net international migration. Wisconsin’s decline reflected that broader pullback.

The slowdown also appeared in the courts. Immigration cases in Wisconsin courts slowed post-inauguration, even as a backlog of 43,000 cases from the past decade persisted.

About three-quarters of that backlog remains unresolved. That combination points to a system processing fewer new cases while carrying a large volume of older ones.

For Dane County, the effect is less about a single local policy change than about the county’s place in wider national and state migration patterns. A community that had recently posted strong population gains from international immigration now faces state trends moving in the opposite direction.

Historically, immigrants drove 25.8% of Dane County’s growth in pre-2018 data. That longer record gives added context to the county’s 2023-2024 gain, when immigration again emerged as the main factor behind population growth.

Over the 2014-2024 decade, Dane County grew 13.9% overall. The county’s recent expansion therefore sits within a longer stretch of sustained growth, not a single-year spike.

Still, the current picture is split into two distinct periods. One period, captured in the 2023-2024 county data, shows a county adding residents at a solid pace, with international immigration providing the biggest push.

The other period, visible in fiscal year 2025 statewide numbers, shows a much tighter environment for international immigration across Wisconsin. Net international migration did not disappear, but it dropped sharply.

That matters because population change often turns on relatively small movements in migration. Wisconsin’s overall population gain in fiscal year 2025 was about 16,000, and net international migration accounted for nearly half of that total.

In Dane County’s earlier 2023-2024 growth, international immigration played an even larger role. The county added 8,600 residents overall, and about 5,900 of those were net new residents from abroad.

Seen together, the figures show why county and state officials, planners and communities watch international immigration closely. In places where births, deaths and domestic migration do not fully explain growth, net international migration can make the difference between faster expansion and a marked slowdown.

The statewide county pattern reinforces that point. Nearly every Wisconsin county saw double-digit drops in net international inflows, a broad trend rather than an isolated local shift.

Some counties moved into net losses. Others held on to narrow gains, such as Shawano County’s 29.

Dane County’s latest detailed local figures predate that statewide contraction. But because international immigration was such a large part of its 2023-2024 increase, any weakening in that flow would likely weigh on the county more than on places that rely less on arrivals from abroad.

That makes Dane County a clear example of how international immigration shapes local demographic change in Wisconsin. It also shows how quickly federal shifts can alter a growth pattern that had looked strong only a year earlier.

The contrast is especially sharp when viewed through the language of net international migration. In one year, Dane County gained about 5,900 residents through international immigration alone; in the following statewide fiscal picture, Wisconsin as a whole posted 7,200 net international migrants after a 67% drop.

Those figures do not measure exactly the same geography or release cycle, but they underscore the scale of the change. They show a county where international immigration had recently powered growth and a state where that same force weakened abruptly.

No newer county totals yet show exactly how Dane County moved through fiscal year 2025 or into 2025-2026. What is clear from the available data is that the county entered the period on a strong footing and that Wisconsin then saw a steep fall in net international migration.

The forces behind that fall were broad: 250,000 fewer visa issuances in the first eight months of 2025 than in 2024, 60,000 fewer refugees admitted in FY2025, and U.S.-Mexico border encounters at 50-year lows. Court activity in Wisconsin also slowed after the inauguration, even with 43,000 backlog cases from the past decade still on the books and about three-quarters unresolved.

For a county that grew 13.9% from 2014 to 2024 and relied heavily on immigration in its most recent local growth snapshot, the state’s turn in 2025 marks a clear break. Dane County’s 8,600-resident increase between 2023 and 2024 showed how strongly international immigration could lift a fast-growing Wisconsin county; the state’s later numbers show how much that engine has cooled.