Mexia, Texas electricity: Oncor wires and 4,406 competitive homes
Mexia sits on Oncor's wires. Below: ZIP by ZIP, who can shop, and what plans cost this month.
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 4,406 active residential meters with a Mexia address, all on Oncor's wires (October 5, 2026). Nearly every Mexia address in our data is on Oncor's wires and can pick a retail provider.
Who delivers electricity in Mexia?
Outages: Oncor at oncor.com/outages.
Oncor delivery charges and area
Can every address in Mexia choose an electricity provider?
No split flag on any ZIP code that holds Mexia's 4,393 competitive homes; most streets here can shop.
Without retail choice unless opted in: 3 other utilities in Limestone County (EIA 2024).
Moving to Mexia
Local numbers for setting up a home in Mexia, each checked on the official source. More contacts, and a printable list, are on Mexia helpful move-in information.
- Water and utility billing: utility billing (start, transfer or stop water service), 254-562-4131.
- Natural gas: Atmos Energy: customer service, 888-286-6700.
- Public schools: Mexia ISD.
- Driver license: Texas DPS Driver License Office: Groesbeck, 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 Mexia 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 Mexia
Typical weather near Mexia, from the nearest NOAA station with a complete 1991-2020 record: Fairfield 3 W, about 17 miles from the city center (station elevation 432 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 95°F; January has the coolest average low, 36°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 578 for the month, and heating-degree days (below 65°F) peak in January at 560. 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 | 36 | 3.7 | 2 | 560 |
| Feb | 61 | 40 | 3.5 | 8 | 412 |
| Mar | 69 | 47 | 3.8 | 24 | 255 |
| Apr | 76 | 54 | 3.3 | 93 | 90 |
| May | 82 | 64 | 4.7 | 256 | 8 |
| Jun | 89 | 70 | 4.5 | 432 | 0 |
| Jul | 94 | 73 | 1.8 | 567 | 0 |
| Aug | 95 | 72 | 2.9 | 578 | 0 |
| Sep | 88 | 66 | 3.2 | 367 | 4 |
| Oct | 79 | 56 | 4.2 | 146 | 70 |
| Nov | 68 | 45 | 3.9 | 27 | 283 |
| Dec | 60 | 38 | 4.1 | 7 | 512 |
Historical weather records for Limestone County
The Texas Railroad Commission's county table lists a record low of -5°F (1989) and a record high of 112°F (1909), and a regional estimate of 24 consecutive hours as a typical longest freezing or frozen-precipitation period for Limestone County. These are historical county extremes, not Mexia'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 Mexia, and not an estimate for your home. EIA source.
Sources: NOAA NCEI U.S. Climate Normals 1991-2020, station USC00413047; Texas Railroad Commission, Historical Weather Data by County (2022).
What is different about electricity in Mexia?
- Mexia counted about 7,091 residents in the Census Bureau's 2025 estimate, against 6,856 in the 2020 base, a change of +3.4%. The largest one-year change was +120 people, from July 2023 to July 2024. July 1 estimates in between: 6,800 (2021), 6,866 (2022), 6,916 (2023), 7,036 (2024). (Census)
- Mexia covers 7.2 square miles of land (Census 2025 Gazetteer). That works out to about 985 residents and 361 occupied households per square mile of land, with roughly 2.7 residents for every Mexia household. (Census, Census, Census)
- The Mexia mailing area is bigger than the city: ERCOT lists 4,406 competitive homes under the Mexia postal city, 1.7 for each of the city's 2,598 Census households. (ERCOT, Census)
- Of the 3,564,530 homes Oncor serves on the competitive market, 0.1% have a Mexia mailing address. (ERCOT)
- Move-ins show up as vacant-to-active switches in ERCOT's daily files: 16 of them in the ZIP codes most Mexia homes use, Oct. 7-18, 2026. (ERCOT)
- On October 5, 2026, ERCOT showed 833 home meters switched off (de-energized) in the ZIP codes most Mexia homes use, against 4,394 switched on; that 15.9 percent is mostly vacant houses and apartments between occupants. (ERCOT)
- One ZIP code, 76667, holds almost every Mexia-addressed competitive home (4,393). Taken whole, 76667 has 1.09 competitive meters per Census household: 4,394 meters, 4,036 households. (ERCOT, Census)
- Among the 6 cities and towns that reach into Limestone County, Mexia places 1 for competitive homes on its postal city; second place is Groesbeck, at 1,559. (ERCOT)
- By the Census Bureau's 2025 estimates, Mexia is the number 1 city or town by population among the 7 that reach into Limestone County, one place ahead of Groesbeck (3,995 residents). (Census)
- Renting is most common in 76667, where the ACS 2020-2024 counts 33.1 percent of households as renters; in that part of Mexia, electricity accounts change hands with each lease. (Census)
- Electric bills over $250 a month: 29.1 percent of households in 76667, Mexia's main ZIP code, per the ACS 2020-2024; the same survey puts median household income there at $52,541. (Census)
- Corsicana, 28 miles from Mexia, has the most competitive homes nearby (11,206); Groesbeck has the fewest per household, still 1.16. (ERCOT, Census)
Mexia electricity by the numbers
| Measure | Value |
|---|---|
| Population (July 1, 2025 estimate) | 7,091 |
| Population (2020 estimates base) | 6,856 |
| Occupied households (ACS 2020-2024) | 2,598 |
| Active residential meters with a Mexia address | 4,406 |
| Active business meters with a Mexia address | 1,746 |
| Residential meters per Census household | 1.7 |
| Delivery utilities (homes) | Oncor 4,406 |
| Counties | Limestone |
| ZIP codes touching Mexia | 1 |
| Split ZIP codes (flagged below) | 0 |
How we built these numbers. Download: Mexia ZIP table (CSV).
What do electricity plans cost in Mexia 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) |
Mexia 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 | Meters per household | ERCOT competitive homes | Census households | With Mexia address | Share of ZIP land in Mexia | Mailing cities | Reading |
|---|---|---|---|---|---|---|---|
| 76667 | 1.09 | 4,394 | 4,036 | 4,393 | 5% | Mexia 100% | Near-full coverage. Mostly outside Mexia city limits. |
Split ZIP codes for Mexia: none flagged.
Homes, renters and electric bills in Mexia’s ZIP codes
ZIP 76667 leads Mexia on electric bills over $250 a month, reported by 29.1 percent of its households (Census ACS 2020-2024).
| ZIP | Bills $250+ | Household income (median) | Built since 2020 | Mexia-addressed homes | Renting | Meters added Oct 7-18 | In 5+ unit buildings | Vacant-to-active switches |
|---|---|---|---|---|---|---|---|---|
| 76667 | 29.1% | $52,541 | 1.0% | 4,393 | 33.1% | 3 | 2.6% | 16 |
ACS 2020-2024 by ZCTA; meters: ERCOT daily files, Oct 7-18, 2026.
Mexia and its neighbors
| Nearby town (2,000+ residents) | Wires utility | Can homes choose? | Postal-city meters per household | Distance | Competitive homes, postal city |
|---|---|---|---|---|---|
| Groesbeck | Oncor | Yes, mostly | 1.16 | 11 mi away | 1,559 homes |
| Teague | Oncor | Yes, mostly | 1.64 | 12 mi away | 2,063 homes |
| Fairfield | Oncor | Yes, mostly | 2.53 | 19 mi away | 2,716 homes |
| Corsicana | Oncor | Yes, mostly | 1.30 | 28 mi away | 11,206 homes |
Business electricity in Mexia
Mexia business meters: 1,746 (2.5 homes per business meter); large non-residential meters in Mexia’s main ZIP codes: 2 (ERCOT, October 5, 2026).
Larger accounts can go out to bid with retail providers and direct suppliers; we can’t promise savings or bids.
How do I compare electricity plans in Mexia?
ZIP first, then your address; read each plan’s Electricity Facts Label before choosing.
Common questions about electricity in Mexia
Does Mexia have electricity choice?
Most Mexia homes can. ERCOT's October 5, 2026 extract has 4,406 Mexia-addressed homes on Oncor's competitive system, compared with 2,598 households in the Census survey. No Mexia ZIP code carries a split flag, but only an address lookup is certain.
Which Mexia ZIP code has the most homes on the competitive market?
That is 76667, home to 4,393 of the competitive meters with a Mexia address. ZIP-wide: 4,394 ERCOT meters, about 4,036 Census households, 1.09 per household.
What is the average electricity rate in Mexia?
On October 19, 2026, the median fixed-rate Power to Choose listing on Oncor's wires was 13.4¢ per kWh at 1,000 kWh a month (170 listings); Oncor's delivery charge of 6.8673¢ per kWh plus $4.06 a month is included. A median is not a quote.
I'm moving to Mexia. How do I set up electricity?
Confirm the address is on Oncor's wires, then pick a plan and a start date. In 76667, 10.8% of residents moved in the past year (ACS); 16 meters in 76667 went vacant-to-active Oct. 7-18, 2026.
Why are there more electric meters than households in Mexia?
4,406 Mexia-addressed meters against 2,598 city households is 1.7 per household: the Mexia postal area extends past city limits, and new homes get meters before the Census counts them. It doesn't mean every nearby address can choose.
Where do I report a Mexia power outage?
Call Oncor (oncor.com/outages), the wires utility for Mexia's 4,406 competitive homes; a retail provider can't fix lines.
Where to next?
Up: Oncor area · Limestone County
Nearest town pages: Corsicana · Marlin · Bellmead · Lacy-Lakeview · Robinson · Waco · Hillsboro · Hewitt
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)
- Census Bureau 2025 Gazetteer Files, Texas places (land and water area)
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