Corsicana, Texas electricity: Oncor wires, 1 split ZIP code to check
Corsicana sits on Oncor's wires, with a few split ZIP codes. 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 11,206 active residential meters with a Corsicana address, all on Oncor's wires (October 5, 2026). 1 of Corsicana's ZIP codes is split, so most addresses can shop, but yours needs a check.
Who delivers electricity in Corsicana?
Outages: Oncor at oncor.com/outages.
Oncor delivery charges and area
Can every address in Corsicana choose an electricity provider?
777 of 11,197 Corsicana-addressed competitive homes (7%) are in split ZIP codes (75109), where a neighbor may have a different utility.
1 more utility (co-op, city-owned or non-ERCOT; EIA 2024) also serves parts of Navarro County; no retail choice there unless the utility opted in.
Moving to Corsicana
Local numbers for setting up a home in Corsicana, each checked on the official source. More contacts, and a printable list, are on Corsicana helpful move-in information.
- Water and utility billing: utility billing (start, transfer or stop water service), 903-654-4825.
- Natural gas: Atmos Energy: customer service, 888-286-6700.
- Public schools: Corsicana ISD, Mildred ISD.
- Driver license: Texas DPS Driver License Office: Corsicana, 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 Corsicana 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 Corsicana
Typical weather near Corsicana, from the nearest NOAA station with a complete 1991-2020 record: Corsicana, about 3 miles from the city center (station elevation 449 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 96°F; January has the coolest average low, 35°F. Average daily highs reach 90°F or more in June 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 604 for the month, and heating-degree days (below 65°F) peak in January at 590. 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 | 57 | 35 | 3.1 | 3 | 590 |
| Feb | 61 | 38 | 3.3 | 7 | 431 |
| Mar | 68 | 46 | 4.0 | 27 | 275 |
| Apr | 76 | 53 | 4.0 | 85 | 103 |
| May | 83 | 63 | 4.3 | 255 | 15 |
| Jun | 90 | 70 | 3.8 | 456 | 0 |
| Jul | 95 | 74 | 2.1 | 591 | 0 |
| Aug | 96 | 73 | 2.5 | 604 | 0 |
| Sep | 90 | 66 | 3.3 | 389 | 4 |
| Oct | 79 | 55 | 5.0 | 145 | 77 |
| Nov | 67 | 45 | 3.2 | 28 | 299 |
| Dec | 59 | 37 | 3.6 | 6 | 525 |
Historical weather records for Navarro County
The Texas Railroad Commission's county table lists a record low of -7°F (1899) and a record high of 113°F (1954), and a regional estimate of 24 consecutive hours as a typical longest freezing or frozen-precipitation period for Navarro County. These are historical county extremes, not Corsicana'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 Corsicana, and not an estimate for your home. EIA source.
Sources: NOAA NCEI U.S. Climate Normals 1991-2020, station USC00412019; Texas Railroad Commission, Historical Weather Data by County (2022).
What is different about electricity in Corsicana?
- The Census Bureau's July 1, 2025 estimate for Corsicana is 25,487 people, up 1.5% on the 2020 estimates base of 25,114. The largest one-year change was +399 people, from July 2020 to July 2021. (Census)
- Mailing addresses stretch past city limits here. 11,206 competitive residential meters use Corsicana as their postal city, while the city itself has 8,587 Census households, a ratio of 1.3. (ERCOT, Census)
- Oncor share: 0.3% of its 3,564,530 competitive residential meters carry a Corsicana address. (ERCOT)
- From Oct. 7 to Oct. 18, 2026, 23 residential meters in Corsicana's main ZIP codes went from vacant to active in ERCOT's daily files, which usually means a move-in. (ERCOT)
- Corsicana's main ZIP codes: 12,458 active and 1,341 de-energized residential meters (9.7% de-energized, usually empty or between tenants). (ERCOT)
- Corsicana's biggest ZIP code for electricity customers is 75110, with 10,420 of the 11,197 competitive homes that carry a Corsicana address and a ZIP-wide ratio of 1.06 meters per household. (ERCOT, Census)
- In ZIP 75109, which holds 777 Corsicana-addressed homes, ERCOT counts only 0.62 competitive meters per Census household. EIA's 2024 data lists Navarro County Electric Cooperative in the counties ERCOT and the Census link to that ZIP; their customers are not on the competitive market unless the utility opted in. (ERCOT, Census, EIA-861)
- 39.1% of households in 75110 rent (ACS 2020-2024), the most among Corsicana's main ZIP codes, so a lot of Corsicana electricity accounts open and close with each lease. (Census)
- Median household income across Corsicana's main ZIP codes runs from $57,370 in 75110 to $88,074 in 75109 (ACS 2020-2024); 40.4% of 75109 households and 28.7% of 75110 households report $250+ monthly electric bills. (Census)
Corsicana electricity by the numbers
| Measure | Value |
|---|---|
| Population (July 1, 2025 estimate) | 25,487 |
| Population (2020 estimates base) | 25,114 |
| Occupied households (ACS 2020-2024) | 8,587 |
| Active residential meters with a Corsicana address | 11,206 |
| Active business meters with a Corsicana address | 3,233 |
| Residential meters per Census household | 1.3 |
| Delivery utilities (homes) | Oncor 11,206 |
| Counties | Navarro |
| ZIP codes touching Corsicana | 2 |
| Split ZIP codes (flagged below) | 1 |
How we built these numbers. Download: Corsicana ZIP table (CSV).
What do electricity plans cost in Corsicana 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) |
Corsicana 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 | Corsicana homes | Land in Corsicana | Postal cities | Competitive homes (ERCOT) | Households (Census) | Ratio | What it means |
|---|---|---|---|---|---|---|---|
| 75110 | 10,420 | 13% | Corsicana 93%, Retreat 2%, Oak Valley 1% | 11,172 | 10,586 | 1.06 | Near-full coverage. |
| 75109 | 777 | 5% | Corsicana 60%, Mildred 18%, Eureka 9% | 1,286 | 2,074 | 0.62 | Split. Most homes, not all. Mostly outside Corsicana city limits. |
Split ZIP codes for Corsicana: 75109.
Homes, renters and electric bills in Corsicana’s ZIP codes
$250+ monthly electric bills peak in 75109 (40.4% of households); renters in 75110 (39.1%).
| ZIP | Corsicana homes | Median income | Renters | 5+ units | $250+ bills | Built 2020+ | New meters | Vacant to active |
|---|---|---|---|---|---|---|---|---|
| 75110 | 10,420 | $57,370 | 39.1% | 6.9% | 28.7% | 3.2% | 3 | 21 |
| 75109 | 777 | $88,074 | 10.4% | 0.0% | 40.4% | 4.5% | 1 | 2 |
ACS 2020-2024 by ZCTA; meters: ERCOT daily files, Oct 7-18, 2026.
How do towns near Corsicana compare?
| Town (2,000+ people) | Miles | Competitive homes | Per household | Utility | Status |
|---|---|---|---|---|---|
| Ennis | 19 mi | 11,809 | 1.48 | Oncor | Most addresses can choose |
| Tool | 22 mi | 405 | 0.38 | Oncor | Partly |
| Italy | 26 mi | 1,233 | 1.72 | Oncor | Most addresses can choose |
| Gun Barrel City | 26 mi | 4,745 | 1.63 | Oncor | Most addresses can choose |
| Palmer | 27 mi | 1,302 | 1.66 | Oncor | Most addresses can choose |
| Malakoff | 27 mi | 2,055 | 2.48 | Oncor | Most addresses can choose |
Business electricity in Corsicana
Corsicana business meters: 3,233 (3.5 homes per business meter); large non-residential meters in Corsicana’s main ZIP codes: 17 (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 Corsicana?
ZIP first, then your address; read each plan’s Electricity Facts Label before choosing.
Common questions about electricity in Corsicana
Can I choose my electricity provider in Corsicana?
Most Corsicana homes can. ERCOT's October 5, 2026 extract has 11,206 Corsicana-addressed homes on Oncor's competitive system, compared with 8,587 households in the Census survey. Split ZIP codes for Corsicana: 75109; on those, check the exact address.
Which Corsicana ZIP code has the most homes on the competitive market?
75110, with 11,172 competitive homes in ERCOT's data (10,420 addressed to Corsicana) against roughly 10,586 Census households, a 1.06 ratio. Coverage is thinnest in 75109, at 0.62.
Are electric bills high in Corsicana?
In 75109, 40.4% of households reported electricity bills of $250 or more a month in the ACS 2020-2024 survey, the highest among Corsicana's main ZIP codes; in 75110 it was 28.7%. House size and heating type explain much of the difference.
I'm moving to Corsicana. How do I set up electricity?
16.4% of 75110 residents moved within a year (ACS), and 21 75110 meters turned from vacant to active Oct. 7-18, 2026. Check that your Corsicana address is on Oncor's wires, then choose a plan and start date.
Why are there more electric meters than households in Corsicana?
11,206 Corsicana-addressed meters against 8,587 city households is 1.3 per household: the Corsicana 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 Corsicana power outage?
Oncor, at oncor.com/outages: it carries power to all 11,206 Corsicana-addressed competitive homes, whatever retail provider bills them.
Where to next?
Up: Oncor area · Navarro County
Nearest town pages: Ennis · Waxahachie · Red Oak · Glenn Heights · Seagoville · Lancaster · Midlothian · DeSoto
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.