[6] During the early 1900s, the Wagner Electric Company, a manufacturer of small motors for appliances and transformers, began development along Plymouth Avenue in Wellston, growing to occupy the entire block and providing 4,500 jobs during World War I.

[5] North of the Wagner site, ABEX Corporation built a steel foundry that began operation in 1923.

[5] In 1982 ABEX moved out of its Wellston location; the next year, the Wagner Electric Company closed its doors.

[5] After closure, it took 22 years, and millions of dollars in tax credits and development grants, for the St. Louis County Economic Council to demolish five buildings and clean up 15 acres (6.1 ha) of the Wagner brownfield land along the MetroLink so that it could be made marketable as the Plymouth Industrial Park.

[7] According to the United States Census Bureau, the city has a total area of 0.93 square miles (2.41 km2), all land.

It is located at 6402 Plymouth Avenue and serves an average of 1,569 passengers daily.

[citation needed] As of the census[13] of 2010, there were 2,313 people, 785 households, and 540 families living in the city.

27.1% of all households were made up of individuals, and 9.1% had someone living alone who was 65 years of age or older.