Mansfield, Texas spreads across three counties southeast of Fort Worth, and it added roughly 16,000 residents between the 2010 and 2020 censuses. New subdivisions cut into old farmland behave differently from established streets, and the pests know it.
Mansfield is mostly in Tarrant County with smaller pieces in Ellis and Johnson counties, about 20 miles from Fort Worth and 30 from Dallas, sharing a border with Arlington. The 2020 census counted 72,602 people, up from 56,368 in 2010, in 25,204 housing units where 45 percent of households include children. The town began in the oak groves along Walnut Creek, where a steam-powered grist mill was finished by 1859, and it stayed a farm-trade hub after incorporating in 1890.
That farm past is the pest story. When builders strip rolling Cross Timbers pasture and lay sod, red imported fire ants colonize the disturbed soil first, and construction debris left near a slab feeds native termites. Bright new streetlights and porch lights pull in the black field crickets that swarm much of Texas every late summer. The city works with Tarrant County Public Health to monitor mosquitoes for West Nile virus from April through November, and both Tarrant and Johnson counties have Formosan termite records with Texas A&M AgriLife Extension.
