Karnes City, Texas electricity: AEP Texas Central wires and 1,444 competitive homes
Karnes City, pop. 3,540, buys power over AEP Texas Central's lines; 1,444 homes here are on the competitive market.
Reviewed by Brent Ward, founder, on 2026-10-19. Updated .
Karnes City at a glance: 1,444 Karnes City-addressed homes, all wired by AEP Texas Central (ERCOT, Oct. 5, 2026). Karnes City's 1,444 placed homes sit in unsplit ZIP codes; a lookup still confirms each address.
Karnes City wires and choice
AEP Texas Central outages: aeptexas.com/outages. AEP Texas Central
Karnes City's 1,444 placed homes sit in unsplit ZIP codes; a lookup still confirms each address.
Non-choice utilities listed by EIA (2024) for Karnes: 2.
Moving to Karnes City
Local numbers for setting up a home in Karnes City, each checked on the official source. More contacts, and a printable list, are on Karnes City helpful move-in information.
- Water and utility billing: utility billing (start, transfer or stop water service), 830-780-3422.
- Natural gas: CenterPoint Energy: gas leak emergency (24/7), 888-876-5786.
- Public schools: Karnes City ISD.
- Driver license: Texas DPS Driver License Office: Karnes City, 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 Karnes City 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 Karnes City
Typical weather near Karnes City, from the nearest NOAA station with a complete 1991-2020 record: Floresville, about 23 miles from the city center (station elevation 400 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 98°F; January has the coolest average low, 39°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 629 for the month, and heating-degree days (below 65°F) peak in January at 418. 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 | 65 | 39 | 1.6 | 12 | 418 |
| Feb | 69 | 43 | 1.6 | 23 | 278 |
| Mar | 76 | 51 | 2.3 | 78 | 134 |
| Apr | 82 | 56 | 2.4 | 166 | 40 |
| May | 88 | 66 | 4.4 | 374 | 4 |
| Jun | 94 | 71 | 3.0 | 523 | 0 |
| Jul | 96 | 74 | 2.3 | 615 | 0 |
| Aug | 98 | 73 | 2.7 | 629 | 0 |
| Sep | 92 | 68 | 4.1 | 445 | 1 |
| Oct | 84 | 58 | 3.2 | 230 | 38 |
| Nov | 74 | 48 | 2.3 | 63 | 185 |
| Dec | 66 | 41 | 1.8 | 19 | 375 |
Historical weather records for Karnes County
The Texas Railroad Commission's county table lists a record low of 6°F (1899) and a record high of 112°F (1954), and a regional estimate of 18 consecutive hours as a typical longest freezing or frozen-precipitation period for Karnes County. These are historical county extremes, not Karnes City'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 Karnes City, and not an estimate for your home. EIA source.
Sources: NOAA NCEI U.S. Climate Normals 1991-2020, station USC00413201; Texas Railroad Commission, Historical Weather Data by County (2022).
Karnes City electricity, in numbers and sources
- Land: 2.3 sq mi; 1,525 residents and 474 households per sq mi; 3.22 people per Karnes City household. [Gazetteer; PEP; ACS]
- Heating fuel, Karnes City homes (ACS 2020-2024): electricity 76.8% (±15), utility gas 20.1%; Karnes County overall: 81.2% electric. All-electric homes feel winter rates more. [ACS]
- Of Karnes City homes paying a power bill, 29.7% report $250 or more a month and 16.7% under $100 (Karnes County: 36.4% at $250+); 94.0% of homes pay one at all. [ACS]
- Housing stock: 60.7% detached houses, 20.6% mobile homes; median year built 1974, 23.6% built 2010 or later. [ACS]
- Karnes City-addressed home meters on Oct. 5, 2026: 1,444 active, 423 inactive, 374 de-energized, so 35.6% were not in use (ERCOT). [ERCOT]
- ACS 2020-2024: 21.6% of Karnes City housing units vacant (±9), with 15.1% of vacant units held for seasonal use. Vacant homes keep meters that are not counted as households. [ACS]
- 1,444 home meters use the Karnes City postal name, against 1,101 households inside city limits (1.31 per household): the mailing area runs well past the boundary. [ERCOT; ACS]
- 78118 carries every one of Karnes City's placed homes; ratio across the whole ZIP 0.95, from 1,445 home meters in all and 1,525 households. [ERCOT; ACS]
Karnes City homes: heating fuel, bills, housing
| Karnes City | Estimate |
|---|---|
| Heat with electricity | 76.8% |
| Heat with utility gas | 20.1% |
| Bill $250 or more | 29.7% |
| Built 2010 or later | 23.6% |
| Renter households | 29.5% |
| Median year built | 1974 |
ACS 2020-2024, the city (Census boundary). Bill rows are shares of homes that pay an electric bill.
Karnes City meters and households
| Count | Karnes City |
|---|---|
| Residents, July 2025 | 3,540 |
| Residents, 2020 base | 3,593 |
| Households (ACS) | 1,101 |
| Active home meters | 1,444 |
| Inactive home meters | 423 |
| De-energized home meters | 374 |
| Active small-business meters | 385 |
| Active large-business meters | 1 |
| Home meters per household | 1.31 |
| ZIP codes listed | 1 |
| Split ZIP codes | 0 |
| County | Karnes |
ERCOT report 203, Oct. 5, 2026 (Karnes City postal city) and Census. CSV · Method
Karnes City plan prices, October 19, 2026
Median fixed-rate Power to Choose listings. AEP Texas Central (164 listings): 12.7¢ / 12.1¢ / 12¢ per kWh at 500 / 1,000 / 2,000 kWh, delivery 5.6898¢ + $3.24/mo included. Not a quote.
Karnes City ZIP codes, row by row
Not every address in these ZIP codes has retail choice; check your exact address.
| ZIP code | Karnes City homes | All ZIP homes | Karnes City share | ZIP households | Share of Karnes City land | Meters per household | Flags |
|---|---|---|---|---|---|---|---|
| 78118 | 1,444 | 1,445 | 100% | 1,525 | 100% | 0.95 | none |
Karnes City split ZIP codes: none.
Towns around Karnes City
Karnes City businesses
386 Karnes City-addressed business meters; 1 large-class meters across its main ZIP codes (ERCOT). Request a business rate review.
Compare Karnes City plans
Karnes City questions
Do I get to pick my electric company in Karnes City?
Yes, on AEP Texas Central's wires: 1,444 Karnes City homes were on the competitive market Oct. 5, 2026 (1.31 per household). Confirm your address.
Do Karnes City homes heat with electricity?
76.8% of Karnes City homes heat with electricity (ACS 2020-2024, margin ±15) and 20.1% with utility gas; 29.7% of bill-paying homes report $250 or more a month. Electric-heat homes should compare plans at winter usage.
What ZIP code do most Karnes City electricity customers have?
78118: 1,444 Karnes City-addressed competitive homes; ratio 0.95 across the ZIP (1,445 home meters in all, 1,525 households).
Who do I call when the power is out in Karnes City?
Outages go to AEP Texas Central (aeptexas.com/outages), the wires utility for 1,444 Karnes City competitive homes.
How do I set up power at a new Karnes City home?
Check the address is on AEP Texas Central's wires, choose a plan and a start date. Karnes City had 797 idle home meters (inactive or de-energized) on Oct. 5, 2026, so many move-ins reconnect an existing meter.
Near Karnes City
Wires and county: AEP Texas Central · Karnes. Nearby pages: Beeville (34 mi) · George West (41 mi) · Jourdanton (39 mi) · Kenedy (6 mi) · Nixon (28 mi) · Pleasanton (36 mi)
No-choice areas · Methodology · Compare plans
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, tables B25040, B25132, B25024, B25034, B25035, B25018, B19013, B25003, B25002, B25004 (90% margins of error)
- 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)
- AEP Texas (Central Division)
- AEP Texas Central delivery tariff (effective September 29, 2026)
- Census Bureau 2025 Gazetteer Files, Texas places (land and water area)
BJW Ventures LLC d/b/a Power Hopper | PUCT BR260201. PUCT registration is not an endorsement.