Is Bay County, MI's population growing or shrinking?
Refreshed annually
It shrank by 309 between 2024 and 2025. Changes in population reflect birth and death rates, immigration patterns, regional shifts, and even the overall health of the economy. Bay County, MI’s 0.3% annual decrease was primarily driven by deaths outpacing births.
In the decade between 2015 and 2025, Bay County, MI’s population shrank by 3%.
-309
population change (2024 to 2025)
-0.3%
percent change in population (2024 to 2025)
Since 2000, Bay County, MI’s population increased 3 out of 25 years. The largest increase occurred between 2019 and 2020, when Bay County, MI gained 775 residents. Its largest decline occurred between 2015 and 2016 when there were 850 fewer residents.
Bay County, MI lost 309 residents between 2024 and 2025.
Annual population change, 2001–2025
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What contributes to population change in Bay County, MI?
A county’s population is influenced by three factors:
- Natural population change: If births outnumber deaths in a given year, natural population growth is positive. If deaths exceed births, it is negative. Between 2024 and 2025 natural population change was negative in Bay County, MI, with deaths exceeding births by 465.
- Immigration: international migration directly into or out of a county: If more people move in than move out, population change from immigration is positive. If more people move out than move in, it’s negative. Between 2024 to 2025, Bay County, MI’s population change from immigration was positive with about 40 more people coming from another country directly to Bay County, MI than leaving.
- Domestic migration, moving between counties: Between 2024 to 2025, Bay County, MI’s population change from domestic migration was positive with about 112 more people coming from any other county in the US.
Between 2024 and 2025, natural change was the primary driver of population decline in Bay County, MI.
Components of population change from previous year, 2011–2025
How is the US population changing?
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Methodology
USAFacts standardizes data, in areas such as time and demographics, to make it easier to understand and compare.
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USAFacts endeavors to share the most up-to-date information available. We sourced the data on this page directly from government agencies; however, the intervals at which agencies publish updated data vary.
