British Population in Lewis and Clark County, MT by City : 2025 Ranking & Insights

The British population in Lewis and Clark County, MT totals 523 residents, according to the most recent census estimates. Of these, Helena and East Helena account for 201 and 67 residents respectively, suggesting a shared urban presence. However, the remaining population appears to reside outside city boundaries, likely spread across unincorporated parts of Lewis and Clark County or smaller incorporated cities not captured in this ranking analysis*. The analysis below explores this hybrid distribution and how it reflects broader trends across Montana counties.

Top 5 cities with the largest British population in Lewis and Clark County

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  • 1
    Helena
    British population in Helena is 201
    0.61% of Helena population is British
  • 2
    East Helena
    British population in East Helena is 67
    3.61% of East Helena population is British

Overview of British population in Lewis and Clark County

  • Population Count and Percentage: American Community Survey data document Lewis and Clark County with 523 British residents (0.72% of 72,580 total county population), positioning the jurisdiction at the 82nd percentile nationally among counties and 91st percentile within Montana for British population concentrations, despite absolute population figures.
  • Comparison to State and National Averages: Census Bureau's ACS show Lewis and Clark County's British population of 0.72% surpassing both Montana's state average of 0.45% and the national average of 0.45%, positioning the county as a high-concentration jurisdiction exceeding demographic benchmarks across all geographic scales.
  • Share of Total State Population: Official American Community Survey indicate Lewis and Clark County's 523 British residents constitute 10.6% of Montana's total British population of 4,933, placing the county among jurisdictions with the highest demographic concentrations, with 10.6% of all Montana British Americans residing within county boundaries.
  • Population Density per Square Mile: U.S. Census Bureau's American Community Survey indicate Lewis and Clark County's density of 0.15 British Americans per square mile exceeds Montana's average of 0.034 per square mile by four and a half times, establishing the county as a significant concentration center for British demographic communities.
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Lewis and Clark County Cities by British Population

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ACS [1] population records show Helena and East Helena account for 201 and 67 British residents. The following table shows comprehensive population data, demographic percentages, density measurements, and complete comparison metrics for both cities in Lewis and Clark County, MT.
cities in Lewis and Clark County, MT ranked by British population count
Rank by British Population
City
British Population
% of Total City Population
% of Total Lewis and Clark County British Population
5 Year Rank Trend
1 Helena 201 0.61% 38.43%
2 East Helena 67 3.61% 12.81%
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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 Lewis and Clark County, MT by their British population, using the most recent ACS data available.

How the Census defines British 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 British 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 British alone, while others identify as British along with another race (such as British and German).
  • We’ve used the “British alone or in any combination” category unless noted otherwise, which gives a broader picture of the British population in each area.

How We Ranked the Data

This ranking is based on the total number of people who identified as British 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 British .
  2. % of Total Lewis and Clark County British Population – This tells us how much of the entire U.S. British 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 British 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 British 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 British populations are most concentrated while keeping the numbers easy to understand.

Sources

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