In 2023, Alpena, SD had a population of 349 people with a median age of 36 and a median household income of $65,417. Between 2022 and 2023 the population of Alpena, SD declined from 407 to 349, a −14.3% decrease and its median household income declined from $67,500 to $65,417, a −3.09% decrease.
The 5 largest ethnic groups in Alpena, SD are White (Non-Hispanic) (53.9%), Other (Hispanic) (20.3%), White (Hispanic) (12.6%), Two+ (Non-Hispanic) (8.6%), and American Indian & Alaska Native (Non-Hispanic) (2.87%).
None of the households in Alpena, SD reported speaking a non-English language at home as their primary shared language. This does not consider the potential multi-lingual nature of households, but only the primary self-reported language spoken by all members of the household.
88.8% of the residents in Alpena, SD are U.S. citizens.
In 2023, the median property value in Alpena, SD was $46,100, and the homeownership rate was 91.3%.
Most people in Alpena, SD drove alone to work, and the average commute time was 13.5 minutes. The average car ownership in Alpena, SD was 2 cars per household.