Brant Lake, South Dakota Demographics & Population 2026

A note before these figures: with a population of 63, Brant Lake'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

Brant Lake is a small community located in South Dakota, within Lake County. The total population is 63. It ranks as the 360th most populous out of 439 Census-designated places in South Dakota.

Age Demographics

The median age in Brant Lake is 66.2 years. This is 74% higher than the state median of 38.0 years.

Economy, Income & Housing

The median household income in Brant Lake is $104,318. This is 39% higher than the state median of $75,081. It is also 29% higher than the national median of $80,734. The ACS records no residents below the poverty line in Brant Lake. In a community this small the estimate rests on very few survey responses, so it should be read as an absence of measurement rather than a measured absence of poverty. The survey records no unemployed residents in Brant Lake, which reflects the size of the sample rather than a labor market without joblessness. The median home value is $455,000. Housing costs are 77% higher than the state median of $257,400. The home-value-to-income ratio is 4.4x. 95.8% of occupied housing units are owner-occupied. This homeownership rate is 40% higher than the state average of 68.6%.

Race & Ethnicity

Brant Lake has a predominantly White (non-Hispanic) population, comprising 92.1% of all residents.

Education

67.7% of residents aged 25 and older hold a bachelor's degree or higher. This places Brant Lake in the top 10% of all cities in the state for educational attainment. This is 112% higher than the state rate of 31.9%. Nationally, 35.7% of adults hold at least a bachelor's degree. The high school graduation rate (or equivalent) is 96.8%.

Data Sources & Methodology

All demographic data for Brant Lake, South Dakota 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 South Dakota state averages and national averages calculated from the same dataset. Rankings reflect the city's position among all 439 Census-designated places in South Dakota. Read more about how these figures are produced on our methodology page, or visit data.census.gov for official data.