Duncanville, Texas
Duncanville is a suburban city in southwestern Dallas County, part of a cluster of communities known locally as the Best Southwest, along with neighboring Cedar Hill, DeSoto, and Lancaster. It lies roughly 11 miles southwest of downtown Dallas on the rolling prairie south of the Trinity River, developed largely as a residential community within the Dallas metropolitan area.
Place essentials
Official Census snapshot- Census place type
- City
- July 2025 population
- 38,915
- Change from 2020 base
- -4.4%
- Land area
- 11.2 sq. mi.
- County footprint
- Dallas County
Place type, county footprint, and land area use the Census Bureau's January 1, 2025 geography. Population uses Vintage 2025 estimates through July 1, 2025; change compares that estimate with the April 1, 2020 estimates base. Geography file | Population file
Property here runs through the appraisal district and tax office for Dallas County. The homestead exemption, appraisal cap, protests, and any MUD, PID, or special districts all sit at the parcel level.
Official routes
Use the office for the parcel address; a mailing city is not always the governing city.
County context
What to know around Duncanville
County lines carry much of the property, land, water, and outdoors context around Duncanville.
County History
Dallas County Was Created in 1846
Texas formed Dallas County on March 30, 1846, from parts of Nacogdoches and Robertson counties, and the city of Dallas became county seat after a close vote in 1850.
Property Tax Basics
Who Appraises Your Property in Dallas County
The Dallas Central Appraisal District sets the value of your property each year, and that value drives your tax bill.
Railroad History
The Railroad Made Dallas County a Commerce Hub
Two major railroads arrived in the early 1870s, transforming Dallas County from a farm settlement into a regional trade center.
Nearby
Places near Duncanville
Nearby counties
Local notes for nearby counties
Next steps for Duncanville
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