Costa Rican Population in Madison County, MT by City : 2025 Ranking & Insights

The Costa Rican population in Madison County, MT is currently reported as zero, according to the latest U.S. Census estimates. Neither Ennis nor Sheridan - the only incorporated cities in Madison County included in this analysis* - show any residents of Costa Rican ancestry. While, today, there is no presence to analyze locally, this dataset still offers a complete snapshot for Madison County. The sections below explores how this compares to similar rural counties across Montana and the U.S.

Top 5 cities with the largest Costa Rican population in Madison County

View All
  • 1
    Ennis
    Costa Rican population in Ennis is 0
    - of Ennis population is Costa Rican
  • 2
    Sheridan
    Costa Rican population in Sheridan is 0
    - of Sheridan population is Costa Rican

Overview of Costa Rican population in Madison County

  • Population Count and Percentage: American Community Survey data documents Madison County with zero Costa Rican residents among its 8,975 total population (0.0%), placing the county at the lowest percentile nationally and within Montana, where state demographic data shows 0.012% of residents are Americans of at least partial Costa Rican descent.
  • Comparison to State and National Averages: Census Bureau's ACS records document Madison County with zero Costa Rican residents, contrasting with Montana's statewide Costa Rican demographic representation of 0.012%, and the national average of 0.055%.
  • Share of Total State Population: Official American Community Survey data shows Madison County with zero Costa Rican residents, while Montana maintains over 130 Costa Rican Americans statewide, placing the county among few jurisdictions without representation of this significant state demographic group.
  • Population Density per Square Mile: U.S. Census Bureau's American Community Survey data documents Madison County with zero Costa Rican residents per square mile, placing the county among jurisdictions without Costa Rican demographic communities, while Montana's state averages maintain less than 0.01 residents per square mile.
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Madison County Cities by Costa Rican Population

View Methodology
American Community Survey data [1] indicate zero Costa Rican population in Madison County, MT and the only incorporated cities in Madison County included in this analysis* — Ennis and Sheridan . The table below provides broader statistics, including total population figures, density measures, and demographic distributions based on current ACS data for both cities.
cities in Madison County, MT ranked by Costa Rican population count
Rank by Costa Rican Population
City
Costa Rican Population
% of Total City Population
% of Total Madison County Costa Rican Population
5 Year Rank Trend
1 Ennis 0 - -
1 Sheridan 0 - -
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Methodology

This ranking list is based on data from the American Community Survey (ACS) 5-Year Estimates, conducted by the U.S. Census Bureau. The ACS is one of the most reliable sources for understanding population trends across different locations, and it provides estimates for various racial and ethnic groups at city, county, state and all geography levels down to the Census block group.
This list ranks city in Madison County, MT by their Costa Rican population, using the most recent ACS data available.

How the Census defines Costa Rican population

The U.S. Census Bureau allows people to self-identify their ancestry, meaning individuals can write upto ancestries when responding to the survey. In this ranking, we include everyone who identifies as having Costa Rican ancestry, whether alone or in combination with another ancestry.
Here are a few important things to know about how ancestry is reported:
  • Some people identify as Costa Rican alone, while others identify as Costa Rican along with another race (such as Costa Rican and German).
  • We’ve used the “Costa Rican alone or in any combination” category unless noted otherwise, which gives a broader picture of the Costa Rican population in each area.

How We Ranked the Data

This ranking is based on the total number of people who identified as Costa Rican alone or in combination in city. To provide additional context, we’ve also included two key percentages:
  1. % of Total City Population – This shows what percentage of the total state population identifies as Costa Rican .
  2. % of Total Madison County Costa Rican Population – This tells us how much of the entire U.S. Costa Rican population lives in that state.
To keep things simple, all population numbers have been rounded to the nearest whole number, and percentages are rounded to one decimal place. Because of rounding, some percentages may not add up to exactly 100%.

Things to Keep in Mind

Like all survey-based data, ACS estimates come with some limitations. Here are a few things to be aware of:
  • In places with very small Costa Rican populations, the numbers may not be reported at all due to privacy protections or sampling variability in the survey.
  • Since the ACS is based on a sample, the numbers are estimates, not exact counts. That means they may slightly differ from other sources like the decennial U.S. Census.
  • City that don’t have any reported Costa Rican population are not included in the ranking but are listed separately below for reference.
This ranking is meant to provide a clear, data-driven look at where Costa Rican populations are most concentrated while keeping the numbers easy to understand.

Sources

  1. 2019-2023 5-Year Estimates.
  2. 2023.