Martinsburg, IA has a population of 125 and is the 26,263rd largest city in the United States. The population density is 333 per sq mi which is 485% higher than the Iowa average and 268% higher than the national average. The median age in Martinsburg is 32 which is approximately 16% lower than the Iowa average of 38. In Martinsburg, 67% of the population over 15 years of age are married, 100% speak English and 0% speak Spanish. 87% of Martinsburg residents were born in Iowa, 13% were born out of state, 0% were born outside of the United States and 0% were foreign born.
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The population density in Martinsburg is 485% higher than Iowa.
The median age in Martinsburg is 16% lower than Iowa.
In Martinsburg 100.00% of the population is White.
In Martinsburg 0.00% of the population is Black or African American.