Duncanville, Texas electricity: Oncor wires and 13,768 competitive homes
13,768 Duncanville-addressed homes buy power on Oncor's system. Here is where choice stops, what delivery costs and where plan prices sit today.
Last updated . Written by Power Hopper. Reviewed by Brent Ward, founder, on 2026-10-19. Data as of October 5, 2026 (meters) and October 19, 2026 (plan prices).
In short: ERCOT counts 13,768 active residential meters with a Duncanville address, all on Oncor's wires (October 5, 2026). Nearly every Duncanville address in our data is on Oncor's wires and can pick a retail provider.
Who delivers electricity in Duncanville?
Outages: Oncor at oncor.com/outages.
Oncor delivery charges and area
Can every address in Duncanville choose an electricity provider?
None of the ZIP codes holding Duncanville's 13,767 competitive homes is flagged split, so most Duncanville streets can shop.
3 more utilities (co-op, city-owned or non-ERCOT; EIA 2024) also serve parts of Dallas County; no retail choice there unless the utility opted in.
Moving to Duncanville
Local numbers for setting up a home in Duncanville, each checked on the official source. More contacts, and a printable list, are on Duncanville helpful move-in information.
- City hall (ask about water service): City of Duncanville: City Hall (main line), 972-780-5000.
- Trash pickup: Republic Services: trash and recycling, 972-225-4207.
- Natural gas: Atmos Energy: customer service, 888-286-6700.
- Public schools: Duncanville ISD.
- Driver license: Texas DPS Driver License Office: Dallas-South Mega Center, 512-424-2600.
You enter your address on the next screen, and we confirm there whether you can choose an electricity provider at that address.
Have a High Light Bill or Electric Bill?
If your electricity bill in Duncanville came in higher than you expected, upload or enter it and see whether another plan could lower your electricity costs, or whether staying where you are makes more sense.
Weather and electricity in Duncanville
Typical weather near Duncanville, from the nearest NOAA station with a complete 1991-2020 record: Joe Pool Lake, about 4 miles from the city center (station elevation 591 ft). These are normals for that station, not readings at your address. August is the warmest month on average, with a normal daily high of 97°F; January has the coolest average low, 33°F. Average daily highs reach 90°F or more in June to September. No month averages a daily low at or below freezing.
For electricity, the normals point to two seasons that can lift a household's usage: cooling-degree days (a measure of how far each day's mean temperature sits above 65°F) peak in August at 609 for the month, and heating-degree days (below 65°F) peak in January at 607. How much that matters to a bill depends on the home, its insulation, its heating fuel and the household, so use your own usage history, not a regional average, when you compare plans.
| Month | Avg high °F | Avg low °F | Precipitation (in) | Cooling degree-days | Heating degree-days |
|---|---|---|---|---|---|
| Jan | 58 | 33 | 2.7 | 1 | 607 |
| Feb | 62 | 38 | 3.0 | 7 | 435 |
| Mar | 69 | 45 | 3.8 | 28 | 273 |
| Apr | 77 | 53 | 3.7 | 88 | 94 |
| May | 84 | 61 | 4.7 | 242 | 14 |
| Jun | 92 | 69 | 4.2 | 452 | 0 |
| Jul | 96 | 73 | 2.3 | 592 | 0 |
| Aug | 97 | 73 | 2.4 | 609 | 0 |
| Sep | 90 | 66 | 3.1 | 404 | 5 |
| Oct | 80 | 54 | 5.0 | 139 | 79 |
| Nov | 68 | 45 | 3.2 | 25 | 292 |
| Dec | 60 | 35 | 3.0 | 3 | 542 |
Historical weather records for Dallas County
The Texas Railroad Commission's county table lists a record low of -10°F (1899) and a record high of 115°F (1909), and a regional estimate of 30 consecutive hours as a typical longest freezing or frozen-precipitation period for Dallas County. These are historical county extremes, not Duncanville's monthly averages and not a forecast; the normals above describe ordinary months.
Reference only: the U.S. Energy Information Administration's 2020 Residential Energy Consumption Survey puts the average Texas household at about 13,440 kWh a year (about 1,120 kWh a month if spread evenly). That is a statewide average for 2020, not Duncanville, and not an estimate for your home. EIA source.
Sources: NOAA NCEI U.S. Climate Normals 1991-2020, station USC00414597; Texas Railroad Commission, Historical Weather Data by County (2022).
What is different about electricity in Duncanville?
- Duncanville counted about 38,915 residents in the Census Bureau's 2025 estimate, against 40,705 in the 2020 base, a change of -4.4%. The largest one-year change was -713 people, from July 2020 to July 2021. (Census)
- Oncor share: 0.4% of its 3,564,530 competitive residential meters carry a Duncanville address. (ERCOT)
- From Oct. 7 to Oct. 18, 2026, 14 residential meters in Duncanville's main ZIP codes went from vacant to active in ERCOT's daily files, which usually means a move-in. (ERCOT)
- 145 of the 13,918 home meters in Duncanville's main ZIP codes (1.0%) were de-energized on October 5, 2026, typically a vacant unit awaiting its next account. (ERCOT)
- Duncanville's biggest ZIP code for electricity customers is 75137, with 7,191 of the 13,767 competitive homes that carry a Duncanville address and a ZIP-wide ratio of 1.06 meters per household. (ERCOT, Census)
- 39.3% of households in 75116 rent (ACS 2020-2024), the most among Duncanville's main ZIP codes, so a lot of Duncanville electricity accounts open and close with each lease. (Census)
- Median household income across Duncanville's main ZIP codes runs from $67,390 in 75116 to $82,253 in 75137 (ACS 2020-2024); 45.0% of 75137 households and 23.0% of 75116 households report $250+ monthly electric bills. (Census)
- Duncanville's land splits across 2 main ZIP codes, led by 75137 (53%) and 75116 (46%), per the Census 2020 ZCTA-to-place relationship file. (Census)
- Of Duncanville's six nearest towns, Grand Prairie has the most competitive homes (75,166, 7 mi away) and Glenn Heights the fewest per household (0.59). (ERCOT, Census)
Duncanville electricity by the numbers
| Measure | Value |
|---|---|
| Population (July 1, 2025 estimate) | 38,915 |
| Population (2020 estimates base) | 40,705 |
| Occupied households (ACS 2020-2024) | 13,215 |
| Active residential meters with a Duncanville address | 13,768 |
| Active business meters with a Duncanville address | 2,202 |
| Residential meters per Census household | 1.04 |
| Delivery utilities (homes) | Oncor 13,768 |
| Counties | Dallas |
| ZIP codes touching Duncanville | 2 |
| Split ZIP codes (flagged below) | 0 |
How we built these numbers. Download: Duncanville ZIP table (CSV).
What do electricity plans cost in Duncanville right now?
Same-day medians for Oncor’s area (Oncor: 170 listings), delivery included; not a quote.
| Delivery utility | 500 kWh | 1,000 kWh | 2,000 kWh | Delivery charge |
|---|---|---|---|---|
| Oncor | 14.1¢ | 13.4¢ | 13.2¢ | 6.8673¢/kWh + $4.06/mo (effective October 4, 2026; tariff) |
Duncanville ZIP codes: how much of each is on the competitive market?
Not every address in these ZIP codes has retail choice; check your exact address.
| ZIP | Duncanville homes | Land in Duncanville | Postal cities | Competitive homes (ERCOT) | Households (Census) | Ratio | What it means |
|---|---|---|---|---|---|---|---|
| 75137 | 7,191 | 99% | Duncanville 100% | 7,191 | 6,770 | 1.06 | Near-full coverage. |
| 75116 | 6,576 | 100% | Duncanville 100% | 6,582 | 6,445 | 1.02 | Near-full coverage. |
Split ZIP codes for Duncanville: none flagged.
Homes, renters and electric bills in Duncanville’s ZIP codes
$250+ monthly electric bills peak in 75137 (45.0% of households); renters in 75116 (39.3%).
| ZIP | Duncanville homes | Median income | Renters | 5+ units | $250+ bills | Built 2020+ | New meters | Vacant to active |
|---|---|---|---|---|---|---|---|---|
| 75137 | 7,191 | $82,253 | 28.9% | 10.3% | 45.0% | 0.0% | 0 | 7 |
| 75116 | 6,576 | $67,390 | 39.3% | 15.4% | 23.0% | 0.2% | 0 | 7 |
ACS 2020-2024 by ZCTA; meters: ERCOT daily files, Oct 7-18, 2026.
How do towns near Duncanville compare?
| Town (2,000+ people) | Miles | Competitive homes | Per household | Utility | Status |
|---|---|---|---|---|---|
| DeSoto | 4 mi | 21,968 | 1.06 | Oncor | Most addresses can choose |
| Cedar Hill | 5 mi | 18,109 | 1.09 | Oncor | Most addresses can choose |
| Cockrell Hill | 7 mi | 950 | 0.79 | Oncor | Most addresses can choose |
| Grand Prairie | 7 mi | 75,166 | 1.10 | Oncor | Most addresses can choose |
| Glenn Heights | 7 mi | 3,535 | 0.59 | Oncor | Partly |
| Ovilla | 7 mi | 1,905 | 1.31 | Oncor | Most addresses can choose |
Business electricity in Duncanville
Duncanville business meters: 2,202 (6.3 homes per business meter); large non-residential meters in Duncanville’s main ZIP codes: 4 (ERCOT, October 5, 2026).
We compare retail providers and direct suppliers and can bid out high-consumption accounts, but we can’t promise savings or how many suppliers will bid. Businesses in Texas retail-choice areas can request a rate review online.
How do I compare electricity plans in Duncanville?
ZIP first, then your address; read each plan’s Electricity Facts Label before choosing.
Common questions about electricity in Duncanville
Can Duncanville residents pick their own electric company?
Yes, where Oncor's wires reach the house, which in Duncanville is most of the city: 13,768 homes with a Duncanville mailing address were on the competitive market on October 5, 2026, 1.04 for each Census household. None of Duncanville's ZIP codes is flagged split, though an address check is still the only sure answer.
What is the biggest Duncanville ZIP code for electricity customers?
ZIP 75137: 7,191 of its 7,191 competitive residential meters use a Duncanville address, and the ZIP has about 6,770 Census households (ratio 1.06).
Are electric bills high in Duncanville?
In 75137, 45.0% of households reported electricity bills of $250 or more a month in the ACS 2020-2024 survey, the highest among Duncanville's main ZIP codes; in 75116 it was 23.0%. House size and heating type explain much of the difference.
I'm moving to Duncanville. How do I set up electricity?
7.5% of 75116 residents moved within a year (ACS), and 7 75137 meters turned from vacant to active Oct. 7-18, 2026. Check that your Duncanville address is on Oncor's wires, then choose a plan and start date.
Who restores power in Duncanville after an outage?
Oncor, at oncor.com/outages: it carries power to all 13,768 Duncanville-addressed competitive homes, whatever retail provider bills them.
Where to next?
Up: Oncor area · Dallas County
Nearest town pages: DeSoto · Cedar Hill · Grand Prairie · Glenn Heights · Lancaster · Red Oak · Arlington · Midlothian
Compare plans · Moving · High bill · Texas rates · Areas without retail choice · Methodology
Sources
- ERCOT TDSP ESIID Extract (report 203): full extract as of Oct 5, 2026; daily files Oct 7-18, 2026
- Census ACS 2020-2024 5-year estimates (B25003 households, B01003 population)
- Census Vintage 2025 city and town population estimates
- Census 2020 ZCTA-to-place and ZCTA-to-county relationship files
- EIA-861 (2024) utility service territories by county
- PUCT Power to Choose residential offer export, Oct 19, 2026, 7:59 AM CT
- PUCT: Choosing an Electric Plan
- PUCT broker directory (BR260201)
- Oncor Electric Delivery
- Oncor delivery tariff (effective October 4, 2026)
BJW Ventures LLC d/b/a Power Hopper | PUCT BR260201. PUCT registration is not an endorsement.