Most Michigan counties grew in population last year. See if yours was one of them.

Michigan saw 55 counties — almost 67% of the state — increase in population last year, according to new Vintage 2024 estimates from the U.S. Census Bureau.

The state had a total net gain of 57,103 residents in 2024 — from 10,083,356 in 2023 to 10,140,459, up 0.6%.

The Census report uses a baseline estimate from its 2020 decennial report, and then calculates new births and deaths, as well as domestic and international migration, to create annual estimates.

The leader in growth from 2023 to 2024 was Lake County, which went up 1.87%. The additional 239 residents pushed its population over 13,000.

Oakland County, the second-largest in the state with 1.27 million people, had the highest net increase of residents, jumping 15,502, for a 0.5% increase.

It was the only county to grow by more than 9,000 residents.

On the other end, 27 counties saw a decline, with Luce County shrinking the most, by 1%. Though its small population of 6,328 means it lost only 61 residents.

By net loss, Huron County’s 163-person decrease was the largest in the state, leaving it with a population of 30,780.

Iosco County was the only one in the state to show no growth or decline, matching its population of 25,361 for the second consecutive year.

Below are the top and bottom 10 counties by percent change in population.

Most of Michigan’s highest-populated counties saw increases over the last year.

Each of the top 10 by population increased by at least 0.5%, and every one but two - Genesee and Livingston - exceeded 1,000 new residents.

In fact, of the 36 counties with more than 50,000 residents, only five - Saginaw, Bay, Shiawassee, Tuscola and Cass - saw a drop in population, none greater than a 2% dip.

Inversely, the four least-populated counties - Luce, Keweenaw, Baraga and Ontonagon, all in the Upper Peninsula - also had the largest percentage declines.

Regionally, the western side of Michigan, in particular from Lake to Kent counties, are a cluster of growth. Mason County is the only one in that area to register a drop.

The most significant region of loss came from the Upper Peninsula, with 11 of its 15 counties experiencing a year-over-year decline.

Luce County saw the largest percent decrease, down 0.95%, while Delta County had the U.P.’s largest net decline in residents, with 159 fewer than 2023.

That’s a reversal of trend for the U.P., which from 2020 to 2023 had increases in all but five of its counties.

Now, only Houghton, Marquette and Schoolcraft counties have continued that trend of growth from the previous 3 years.

Adjacent to the U.P., the three counties that top Lower Michigan - Emmet, Cheboygan and Presque Isle - also registered a drop in population, as did nearby Leelanau.

The top of the Thumb also are a cluster of loss.

Below is a searchable database of all 83 counties, their change in population since 2023 and the trend since 2020.