In 2021, Martinsburg, MO had a population of 569 people with a median age of 39.6 and a median household income of $29,229. Between 2020 and 2021 the population of Martinsburg, MO declined from 577 to 569, a −1.39% decrease and its median household income grew from $26,846 to $29,229, a 8.88% increase.
The 5 largest ethnic groups in Martinsburg, MO are White (Non-Hispanic) (96.7%), Black or African American (Non-Hispanic) (2.99%), Other (Hispanic) (0.351%), White (Hispanic) (0%), and Black or African American (Hispanic) (0%).
None of the households in Martinsburg, MO 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.
99.8% of the residents in Martinsburg, MO are U.S. citizens.
Most people in Martinsburg, MO drove alone to work, and the average commute time was 13.3 minutes. The average car ownership in Martinsburg, MO was 4 cars per household.