Martinsburg, NE has a population of 59 and is the 27,957th largest city in the United States. The population density is 565 per sq mi which is 2259% higher than the Nebraska average and 524% higher than the national average. The median age in Martinsburg is 44 which is approximately 22% higher than the Nebraska average of 36. In Martinsburg, 82% of the population over 15 years of age are married, 100% speak English and 0% speak Spanish. 58% of Martinsburg residents were born in Nebraska, 42% were born out of state, 0% were born outside of the United States and 0% were foreign born.