Martinsburg is a city in Keokuk County, Iowa, United States.

[3] The only businesses open to the public in Martinsburg is McBeth Wrecker and Auto Service and a gas station/convenience store.

In 1861, Martinsburg was a half-mile long row of houses mostly on the north side of the road.

The proprietors of a nearby sawmill and grain mill also lived in town.

[6][7] By 1887, Martinsburg had been expanded by 5 subdivisions and it had gained a second church, a second hotel and a post office.

In addition to the two railroad depots, there was a brickworks that mostly made drainage tile, served by the Iowa Central, and a creamery, a gristmill and a grain elevator, served by the Burlington and Western.

According to the United States Census Bureau, the city has a total area of 0.38 square miles (0.98 km2), all of it land.

29.8% of all households were made up of individuals, and 10.7% had someone living alone who was 65 years of age or older.

19.6% of all households were made up of individuals, and 9.8% had someone living alone who was 65 years of age or older.

There were no families and 1.6% of the population living below the poverty line, including no under eighteens and 8.0% of those over 64.