South Hills, Montana Demographics & Population 2026

A note before these figures: with a population of 620, South Hills's ACS estimates come from a small number of survey responses and carry wide margins of error. Individual percentages below — particularly rates that round to 0% or 100% — are approximations, not precise measurements. See data.census.gov for the published margins of error.

Population Overview

South Hills is a small community located in Montana, within Jefferson County. The total population is 620. It ranks as the 137th most populous out of 475 Census-designated places in Montana.

Age Demographics

The median age in South Hills is 48.9 years. This is 21% higher than the state median of 40.4 years.

Economy, Income & Housing

The median household income in South Hills is $168,235. This is 132% higher than the state median of $72,509. It is also 108% higher than the national median of $80,734. The poverty rate stands at 1.0%. This is 92% lower than the state poverty rate of 11.5%. This exceptionally low poverty rate indicates strong economic prosperity across the community. The unemployment rate is 3.6%. The median home value is $703,800. Housing costs are 87% higher than the state median of $375,800. The home-value-to-income ratio is 4.2x. 97.3% of occupied housing units are owner-occupied. This homeownership rate is 41% higher than the state average of 69.2%.

Race & Ethnicity

South Hills has a predominantly White (non-Hispanic) population, comprising 90.8% of all residents. Hispanic or Latino residents account for 2.1%. The Hispanic or Latino population (2.1%) is well below the state average of 4.6%.

Education

51.9% of residents aged 25 and older hold a bachelor's degree or higher. This places South Hills in the top 10% of all cities in the state for educational attainment. This is 48% higher than the state rate of 35.2%. Nationally, 35.7% of adults hold at least a bachelor's degree. The high school graduation rate (or equivalent) is 97.7%. Notably, 24.6% of adults hold a graduate or professional degree, indicating a highly educated workforce.

Data Sources & Methodology

All demographic data for South Hills, Montana is sourced from the U.S. Census Bureau's American Community Survey (ACS) 2020–2024 5-Year Estimates. The ACS collects data from approximately 3.5 million households annually and pools five years of responses so that even small communities can be measured, though the margin of error widens as the population falls. Comparisons are made against Montana state averages and national averages calculated from the same dataset. Rankings reflect the city's position among all 475 Census-designated places in Montana. Read more about how these figures are produced on our methodology page, or visit data.census.gov for official data.