According to the United States Census Bureau, the city has a total area of 9.4square miles (24Square kilometers), all of it land. Lumberton is a city in Hardin County, Texas, United States. The population was 11,943 at the 2010 census. Lumberton is home of Village Creek State Park. It is part of the BeaumontPort Arthur Metropolitan Statistical Area. The Eastex Freeway (comprising State Highways 69, 96, and US 287) runs north from Beaumont into Lumberton and splits into two separate highways to the West and the East in the South part of the town, both running North and South.