Martinsburg is a city located in Berkeley County West Virginia. With a 2020 population of 17,406, it is the 8th largest city in West Virginia and the 2082nd largest city in the United States . Martinsburg is currently declining at a rate of -0.14% annually but its population has increased by 1.04% since the most recent census, which recorded a population of 17,227 in 2010. Martinsburg reached it's highest population of 17,523 in 2014. Spanning over 7 miles, Martinsburg has a population density of 2,625 people per square mile.
The average household income in Martinsburg is $58,422 with a poverty rate of 29.50%. The median rental costs in recent years comes to $948 per month, and the median house value is $157,200. The median age in Martinsburg is 36.9 years, 35.5 years for males, and 38.3 years for females.