Is Big Horn County, MT's population growing or shrinking?
Refreshed annually
It shrank by 95 between 2024 and 2025. Changes in population reflect birth and death rates, immigration patterns, regional shifts, and even the overall health of the economy. Big Horn County, MT’s 0.74% annual decrease was primarily driven by people moving to other states.
In the decade between 2015 and 2025, Big Horn County, MT’s population shrank by 4.2%.
-95
population change (2024 to 2025)
-0.74%
percent change in population (2024 to 2025)
Since 2000, Big Horn County, MT’s population increased 10 out of 25 years. The largest increase occurred between 2013 and 2014, when Big Horn County, MT gained 227 residents. Its largest decline occurred between 2020 and 2021 when there were 186 fewer residents.
Big Horn County, MT lost 95 residents between 2024 and 2025.
Annual population change, 2001–2025
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What contributes to population change in Big Horn County, MT?
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 positive in Big Horn County, MT, with births exceeding deaths by 54.
- 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, Big Horn County’s population change from immigration was negative with about three more people leaving for another country directly from Big Horn County than coming.
- Domestic migration, moving between counties: Between 2024 to 2025, Big Horn County’s population change from domestic migration was negative with about 147 more people moving to any other county in the US.
Between 2024 and 2025, domestic migration was the primary driver of population decline in Big Horn County, MT.
Components of population change from previous year, 2011–2025
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Methodology
USAFacts standardizes data, in areas such as time and demographics, to make it easier to understand and compare.
Page sources
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.
