Rockwall, Texas electricity: Oncor wires, 1 split ZIP code to check
20,168 Rockwall-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 20,168 active residential meters with a Rockwall address, all on Oncor's wires (October 5, 2026). 1 of Rockwall's ZIP codes is split, so most addresses can shop, but yours needs a check.
Who delivers electricity in Rockwall?
Outages: Oncor at oncor.com/outages.
Oncor delivery charges and area
Can every address in Rockwall choose an electricity provider?
5 of 20,168 Rockwall-addressed competitive homes (0%) are in split ZIP codes (75189), where a neighbor may have a different utility.
1 more utility (co-op, city-owned or non-ERCOT; EIA 2024) also serves parts of Rockwall County; no retail choice there unless the utility opted in.
Moving to Rockwall
Local numbers for setting up a home in Rockwall, each checked on the official source. More contacts, and a printable list, are on Rockwall helpful move-in information.
- Water and utility billing: utility billing (start, transfer or stop water service), 972-771-7736.
- Natural gas: Atmos Energy: customer service, 888-286-6700.
- Public schools: Rockwall ISD.
- Driver license: Texas DPS Driver License Office: Rockwall, 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 Rockwall 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 Rockwall
Typical weather near Rockwall, from the nearest NOAA station with a complete 1991-2020 record: Lavon Dam, about 9 miles from the city center (station elevation 510 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 93°F; January has the coolest average low, 34°F. Average daily highs reach 90°F or more in July to August. 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 563 for the month, and heating-degree days (below 65°F) peak in January at 653. 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 | 54 | 34 | 2.6 | 1 | 653 |
| Feb | 58 | 38 | 2.7 | 3 | 474 |
| Mar | 65 | 46 | 3.5 | 19 | 306 |
| Apr | 73 | 53 | 3.7 | 63 | 117 |
| May | 80 | 63 | 4.7 | 217 | 19 |
| Jun | 88 | 70 | 4.1 | 429 | 0 |
| Jul | 92 | 73 | 1.9 | 552 | 0 |
| Aug | 93 | 73 | 2.2 | 563 | 0 |
| Sep | 87 | 66 | 3.1 | 345 | 6 |
| Oct | 77 | 55 | 4.4 | 111 | 87 |
| Nov | 65 | 45 | 3.4 | 15 | 325 |
| Dec | 56 | 36 | 3.5 | 2 | 589 |
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 Rockwall, and not an estimate for your home. EIA source.
Sources: NOAA NCEI U.S. Climate Normals 1991-2020, station USC00415094.
What is different about electricity in Rockwall?
- The Census Bureau's July 1, 2025 estimate for Rockwall is 53,980 people, up 14.1% on the 2020 estimates base of 47,308. The largest one-year change was +2,048 people, from July 2020 to July 2021. (Census)
- Of the 3,564,530 homes Oncor serves on the competitive market, 0.6% have a Rockwall mailing address. (ERCOT)
- From Oct. 7 to Oct. 18, 2026, 22 residential meters in Rockwall's main ZIP codes went from vacant to active in ERCOT's daily files, which usually means a move-in. (ERCOT)
- De-energized homes, usually empty or between tenants, number 1,493 in Rockwall's main ZIP codes, 4.7% of all 31,690 residential meters there. (ERCOT)
- Rockwall's biggest ZIP code for electricity customers is 75087, with 11,371 of the 20,168 competitive homes that carry a Rockwall address and a ZIP-wide ratio of 1.12 meters per household. (ERCOT, Census)
- Median household income across Rockwall's main ZIP codes runs from $129,484 in 75087 to $135,742 in 75032 (ACS 2020-2024); 45.2% of 75032 households and 38.2% of 75087 households report $250+ monthly electric bills. (Census)
- By land area, 54% of Rockwall lies in ZIP 75087 and 41% in 75032 (Census 2020 ZCTA-to-place file); 2 ZIP codes cover at least 5% of the city each. (Census)
- Nearby, McLendon-Chisholm (6 mi) has just 0.44 competitive homes per household, while Rowlett counts 26,540 on its postal city. (ERCOT, Census)
Rockwall electricity by the numbers
| Measure | Value |
|---|---|
| Population (July 1, 2025 estimate) | 53,980 |
| Population (2020 estimates base) | 47,308 |
| Occupied households (ACS 2020-2024) | 18,273 |
| Active residential meters with a Rockwall address | 20,168 |
| Active business meters with a Rockwall address | 2,913 |
| Residential meters per Census household | 1.1 |
| Delivery utilities (homes) | Oncor 20,168 |
| Counties | Rockwall |
| ZIP codes touching Rockwall | 3 |
| Split ZIP codes (flagged below) | 1 |
How we built these numbers. Download: Rockwall ZIP table (CSV).
What do electricity plans cost in Rockwall 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) |
Rockwall 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 | Rockwall homes | Land in Rockwall | Postal cities | Competitive homes (ERCOT) | Households (Census) | Ratio | What it means |
|---|---|---|---|---|---|---|---|
| 75087 | 11,371 | 54% | Rockwall 68%, Fate 29%, Rowlett 2% | 16,724 | 14,951 | 1.12 | Near-full coverage. |
| 75032 | 8,792 | 25% | Rockwall 65%, Heath 30%, Mclendon Chisholm 4% | 13,473 | 13,250 | 1.02 | Near-full coverage. |
| 75189 | 5 | 1% | Royse City 85%, Fate 13%, Nevada 2% | 8,112 | 15,743 | 0.52 | Split. Partial coverage. 11 new residential meters Oct 7-18, 2026. Mostly outside Rockwall city limits. |
Split ZIP codes for Rockwall: 75189.
Homes, renters and electric bills in Rockwall’s ZIP codes
$250+ monthly electric bills peak in 75032 (45.2% of households); post-2020 homes in 75087 (8.0%).
| ZIP | Rockwall homes | Median income | Renters | 5+ units | $250+ bills | Built 2020+ | New meters | Vacant to active |
|---|---|---|---|---|---|---|---|---|
| 75087 | 11,371 | $129,484 | 18.8% | 7.6% | 38.2% | 8.0% | 3 | 13 |
| 75032 | 8,792 | $135,742 | 20.3% | 6.2% | 45.2% | 7.1% | 4 | 9 |
ACS 2020-2024 by ZCTA; meters: ERCOT daily files, Oct 7-18, 2026.
How do towns near Rockwall compare?
| Town (2,000+ people) | Miles | Competitive homes | Per household | Utility | Status |
|---|---|---|---|---|---|
| Fate | 4 mi | 6,337 | 0.94 | Oncor | Most addresses can choose |
| Heath | 5 mi | 4,385 | 1.23 | Oncor | Most addresses can choose |
| McLendon-Chisholm | 6 mi | 606 | 0.44 | Oncor | Partly |
| Rowlett | 6 mi | 26,540 | 1.14 | Oncor | Most addresses can choose |
| Lavon | 7 mi | 3,677 | 1.77 | Oncor | Most addresses can choose |
| Royse City | 8 mi | 6,912 | 1.05 | Oncor | Most addresses can choose |
Business electricity in Rockwall
Rockwall business meters: 2,913 (6.9 homes per business meter); large non-residential meters in Rockwall’s main ZIP codes: 16 (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 Rockwall?
ZIP first, then your address; read each plan’s Electricity Facts Label before choosing.
Common questions about electricity in Rockwall
Can Rockwall residents pick their own electric company?
Most Rockwall homes can. ERCOT's October 5, 2026 extract has 20,168 Rockwall-addressed homes on Oncor's competitive system, compared with 18,273 households in the Census survey. Split ZIP codes for Rockwall: 75189; on those, check the exact address.
Which Rockwall ZIP code has the most homes on the competitive market?
75087, with 16,724 competitive homes in ERCOT's data (11,371 addressed to Rockwall) against roughly 14,951 Census households, a 1.12 ratio.
Are electric bills high in Rockwall?
Bills vary across Rockwall. 45.2% of households in 75032 told the Census survey (ACS 2020-2024) they pay $250 or more a month for electricity, compared with 38.2% in 75087. Bigger, older or all-electric homes push that share up, so compare plans at your own usage.
I'm moving to Rockwall. How do I set up electricity?
12.7% of 75032 residents moved within a year (ACS), and 13 75087 meters turned from vacant to active Oct. 7-18, 2026. Check that your Rockwall address is on Oncor's wires, then choose a plan and start date.
Who do I call in Rockwall when the power goes out?
Call Oncor (oncor.com/outages), the wires utility for Rockwall's 20,168 competitive homes; a retail provider can't fix lines.
Where to next?
Up: Oncor area · Rockwall County
Nearest town pages: Fate · Rowlett · Royse City · Sachse · Wylie · Garland · Murphy · Forney
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.