Gas prices in Duncanville, TX today
Updated Oct 17, 2026, 12:42 PM
Price by chain — today
Chain prices are estimates. We start from the Texas state average ($3.91/gal regular today) and apply typical per-chain offsets. Live per-station pricing coming soon.
cheapest
Murphy USA
$3.79
— no change
Buc-ee's
$3.83
— no change
HEB Gas
$3.86
— no change
Valero
$3.89
— no change
Exxon
$3.96
— no change
Conoco
$3.97
— no change
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Gas prices in Duncanville, Dallas County are updated hourly.
Duncanville is a city of 40,706 residents in Central Texas.
The cheapest regular unleaded today is $3.788/gal at Murphy USA — filling a 15-gallon tank costs $56.82.
Compared to the Texas state average of $3.908/gal, Duncanville drivers pay close to the statewide average.
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gas price
Price per gallon
Murphy USA · Regular
$2.79
Passengers
1
2
3
4
5
6
Distance
239 mi
Houston → Dallas
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Fuel prices & local data — Duncanville, TX ⛽
12:42 PM CT
Dallas CountyDFW MetroplexI-20 corridor40,706 residents
Duncanville sits on I-20 and US-67 in the Best Southwest commuter belt and is known for one of the most successful public-school basketball programs in Texas.
41K
population
2.0
vehicles / household
21%
truck ownership
~$303
est. monthly fuel
What is the cheapest gas station in Duncanville, TX right now?
Murphy USA is currently the cheapest at $3.79/gal for regular unleaded. Prices last updated Oct 17, 2026, 12:42 PM.
Source: AAA Texas, updated Oct 17, 2026, 12:42 PM CT
How much does a full tank cost in Duncanville, TX?
At current prices, filling a 15-gallon tank costs $56.82 at Murphy USA. A 20-gallon tank costs $75.76.
Source: AAA Texas, updated Oct 17, 2026, 12:42 PM CT
How do Duncanville, TX gas prices compare to the Texas state average?
The Texas state average for regular is $3.91/gal. Duncanville, TX drivers pay close to the statewide average — choose Murphy USA to pay below average. I-20 east into Dallas is the primary commute; truck freight volume is moderate.
Source: AAA Texas, updated Oct 17, 2026, 12:42 PM CT