The total population of Martinsburg is estimated to be 110 with 44 males (40.00%) and 66 females (60.00%). There are 22 more females than males in Martinsburg.
In 2022, the population of Martinsburg was 109, a 0.00% decrease year-by-year from 2021. Previously, in 2021, Martinsburg's population was 109, a decline of 0.91% compared to a population of 110 in 2020.
The median age in Martinsburg, IA is 49.0, as per 2021 ACS 5-Year Estimates. Of the total population, 11.61% were under the age of 15, 15.18% aged 15 to 29, 50.00% aged 30 to 64, 20.54% aged 65 to 84, and 2.68% were 85 years of age and older.