Counties in Montana by GDP (US dollars)
Yellowstone County had the highest GDP (US dollars) of 56 counties in 2018, at $10.07 billion. Petroleum County had the lowest, at $12.85 million. The median was $271.15 million and the figure for Montana was $51.15 billion. Source: the U.S. Bureau of Economic Analysis.
All counties, 2018
Full ranking
Other periods
About this ranking
GDP at current prices, millions of US dollars. United States: Bureau of Economic Analysis GDP by state (the national figure is the total of the same table) and GDP by county. Other countries and the World: World Bank, converted from national currency at official annual average exchange rates.
US dollars, for the United States, its states and counties, and for every country and the World from the World Bank. For Spain and the EU in euros use gdp. Exchange rate swings move dollar values even when output does not.
Every value in the ranking comes from the same publisher and the same period, so the counties are compared on one definition. Equal values share a rank.
How to cite
U.S. Bureau of Economic Analysis. CAGDP1: county GDP summary, current-dollar GDP (published in thousands of dollars, shown in millions). https://apps.bea.gov/regional/zip/CAGDP1.zip. Retrieved 2026-10-08.Use this data in your AI agent
Invokely serves this figure to AI assistants through MCP and to code through a REST API, with the source and citation attached. Ask your assistant:
Rank Counties in Montana by GDP (US dollars) using official data, and cite the source.
rank_places {"indicator":"gdp_usd","level":"province","within":"Montana","limit":10}
GET https://invokely.ai/api/v1/rank?indicator=gdp_usd&level=province&within=Montana&limit=10Questions
Which county has the highest GDP (US dollars)?
Yellowstone County, with $10.07 billion in 2018, according to the U.S. Bureau of Economic Analysis.
Which county has the lowest GDP (US dollars)?
Petroleum County, with $12.85 million in 2018.
Where does this ranking come from?
Every value comes from one source and one period, so the places are comparable: U.S. Bureau of Economic Analysis, CAGDP1: county GDP summary, current-dollar GDP (published in thousands of dollars, shown in millions). Retrieved 2026-10-08.
Gross domestic product (GDP), US dollars: other rankings
- Countries
- EU countries
- US states
- US counties
- Counties in Texas
- Counties in Georgia
- Counties in Kentucky
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- Counties in Illinois
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- Counties in Iowa
Counties in Montana: more rankings
- Asian population share
- Bachelor's degree or higher, population 25 and over
- Live births, July to June
- Black or African American population share
- Crude birth rate, July to June
- Crude death rate, July to June
- Deaths, July to June
- Foreign-born population share
- Real GDP growth
- GDP per capita, US dollars
- Hispanic or Latino population share
- Homeownership rate (US, housing units)
- Median age
- Median gross rent (monthly)
- Median home value
- Median household income