Mount Vernon, South Dakota has an MBR Housing Affordability Index score of 139.8 (Highly Affordable) as of October 30, 2026, ranking 185th most affordable of 263 scored South Dakota cities, compared with 111.3 statewide and 97.4 nationally. On a median-priced $164,400 home with 20% down, the South Dakota average 30-year fixed rate of 7.26% means a monthly principal and interest payment of about $898, or 18% of the city’s $60,357 median household income.
The MBR Housing Affordability Index (MBR-HAI) for Mount Vernon is updated every night from live South Dakota mortgage rates and U.S. Census Bureau income, home value and housing cost data for the city. A score of 100 equals the national average; higher scores mean homeownership is more affordable.
Mount Vernon is 28.5 points above the South Dakota score. Scores as of October 30, 2026. See the South Dakota index
View Mount Vernon Mortgage RatesSource: U.S. Census Bureau American Community Survey 5-Year Estimates (2024) for Mount Vernon, South Dakota. The rate is the South Dakota average 30-year fixed rate from MonitorBankRates, since lenders publish rates by state.
Scores update each morning, computed from rate data captured the previous night. Score of 100 = national average at a 6.5% reference rate.