Harlingen, Texas electricity: AEP Texas Central wires, 2 split ZIP codes to check
Harlingen's 29,141 competitive homes sit on AEP Texas Central's wires; here is where choice stops, what delivery costs and how plan prices look 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: Every Harlingen-addressed home in ERCOT's competitive data is on AEP Texas Central's wires (29,141 active residential meters, October 5, 2026). Most Harlingen addresses can choose a retail provider, but 2 of the ZIP codes below are split, so check your exact address.
Who delivers electricity in Harlingen?
Outages: AEP Texas Central at aeptexas.com/outages.
AEP Texas Central delivery charges and area
Can every address in Harlingen choose an electricity provider?
Of the 29,135 Harlingen-addressed competitive homes we can place by ZIP code, 8,455 (29%) are in the split ZIP codes 78552, 78586; on those streets, a neighbor may be on a different utility. The ZIP table below marks each one.
EIA’s 2024 data lists 1 other utility (co-ops, city-owned or outside ERCOT) in the county around Harlingen; they are named on Cameron County. Their customers can’t choose unless the utility opted in.
Moving to Harlingen
Local numbers for setting up a home in Harlingen, each checked on the official source. More contacts, and a printable list, are on Harlingen helpful move-in information.
- City hall (ask about water service): City of Harlingen: City Hall (main line), 956-216-5000.
- Natural gas: Texas Gas Service: customer service, 800-700-2443.
- Public schools: Harlingen CISD, San Benito CISD.
- Driver license: Texas DPS Driver License Office: Harlingen, 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 Harlingen 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 Harlingen
Typical weather near Harlingen, from the nearest NOAA station with a complete 1991-2020 record: Harlingen, about 2 miles from the city center (station elevation 38 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, 51°F. Average daily highs reach 90°F or more in May 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 691 for the month, and heating-degree days (below 65°F) peak in January at 179. 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 | 72 | 51 | 1.2 | 68 | 179 |
| Feb | 76 | 55 | 1.2 | 108 | 97 |
| Mar | 81 | 60 | 1.5 | 213 | 42 |
| Apr | 86 | 66 | 2.3 | 342 | 8 |
| May | 91 | 72 | 2.7 | 510 | 0 |
| Jun | 95 | 76 | 2.4 | 619 | 0 |
| Jul | 97 | 77 | 2.4 | 674 | 0 |
| Aug | 98 | 77 | 2.1 | 691 | 0 |
| Sep | 93 | 74 | 5.8 | 551 | 0 |
| Oct | 88 | 67 | 3.1 | 389 | 5 |
| Nov | 80 | 59 | 2.0 | 183 | 55 |
| Dec | 73 | 53 | 1.6 | 90 | 157 |
Historical weather records for Cameron County
The Texas Railroad Commission's county table lists a record low of 12°F (1899) and a record high of 108°F (1915), and a regional estimate of 18 consecutive hours as a typical longest freezing or frozen-precipitation period for Cameron County. These are historical county extremes, not Harlingen'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 Harlingen, and not an estimate for your home. EIA source.
Sources: NOAA NCEI U.S. Climate Normals 1991-2020, station USC00413943; Texas Railroad Commission, Historical Weather Data by County (2022).
What is different about electricity in Harlingen?
- Magic Valley Electric Cooperative also serves parts of the Rio Grande Valley; EIA lists it in Hidalgo and Cameron counties. Its members are not on the competitive market. Source: Magic Valley; EIA-861 (2024).
- Census estimates put Harlingen at 72,467 residents on July 1, 2025, up 0.8% from a 2020 estimates base of 71,879. Source: Census Bureau.
- ERCOT's daily files added 17 new residential meters in Harlingen's main ZIP codes between Oct. 7 and Oct. 18, 2026, 14 of them in 78550. Source: ERCOT daily.
- Harlingen-addressed business meters number 5,349 in ERCOT's Oct. 5 extract, one for every 5.4 homes. Source: ERCOT TDSP.
- Among the 17 cities and towns that touch Cameron County, Harlingen ranks 1 by competitive homes on its postal city in ERCOT's data, ahead of San Benito (12,290). Source: ERCOT TDSP.
- Renters make up 49.5% of households in 78550, the highest share among Harlingen's main ZIP codes (ACS 2020-2024), so many Harlingen addresses change hands, and electricity accounts, every year. Source: Census ACS.
Harlingen electricity by the numbers
| Measure | Value |
|---|---|
| Population (July 1, 2025 estimate) | 72,467 |
| Population (2020 estimates base) | 71,879 |
| Occupied households (ACS 2020-2024) | 26,007 |
| Active residential meters with a Harlingen address | 29,141 |
| Active business meters with a Harlingen address | 5,349 |
| Residential meters per Census household | 1.12 |
| Delivery utilities (homes) | AEP Texas Central 29,141 |
| Counties | Cameron |
| ZIP codes touching Harlingen | 3 |
| Split ZIP codes (flagged below) | 2 |
How we built these numbers. Download: Harlingen ZIP table (CSV).
What do electricity plans cost in Harlingen right now?
Same-day medians for AEP Texas Central’s area (AEP Texas Central: 164 listings), delivery included; not a quote.
| Delivery utility | 500 kWh | 1,000 kWh | 2,000 kWh | Delivery charge |
|---|---|---|---|---|
| AEP Texas Central | 12.7¢ | 12.1¢ | 12¢ | 5.6898¢/kWh + $3.24/mo (effective September 29, 2026; tariff) |
Harlingen 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 | Main postal cities (homes) | ZIP land inside Harlingen | Competitive homes (ERCOT) | Households (Census) | Ratio | What it means |
|---|---|---|---|---|---|---|
| 78550 | Harlingen 99%, Primera 1% | 26% | 20,941 | 19,733 | 1.06 | Near-full coverage. 14 new residential meters Oct 7-18, 2026. |
| 78586 | San Benito 98%, Laureles 2% | 1% | 12,497 | 15,699 | 0.80 | Split. Most homes, not all. Split: Brownsville Public Utilities Board (Brownsville city limits cover about 6% of the ZIP's land); that utility's customers can't choose. Mostly outside Harlingen city limits. |
| 78552 | Harlingen 82%, Primera 10%, Palm Valley 7% | 29% | 10,265 | 13,567 | 0.76 | Split. Most homes, not all. |
Split ZIP codes for Harlingen: 78552, 78586.
Homes, renters and electric bills in Harlingen’s ZIP codes
Among Harlingen’s main ZIP codes, 78552 has the largest share of households paying $250 or more a month for electricity (32.2%); 78550 has the most renters (49.5% of households).
How do towns near Harlingen compare?
Within about 28 miles; whole-place estimates.
| Town | Population | Distance | Delivery utility | Status | Competitive homes (postal city) |
|---|---|---|---|---|---|
| Primera | 5,478 | 4 mi | AEP Texas Central | Most addresses can choose | 1,325 |
| Combes | 3,255 | 4 mi | AEP Texas Central | Most addresses can choose | 1,095 |
| San Benito | 24,980 | 5 mi | AEP Texas Central | Most addresses can choose | 12,290 |
| Rio Hondo | 2,332 | 8 mi | AEP Texas Central | Most addresses can choose | 1,165 |
| La Feria | 7,222 | 8 mi | AEP Texas Central | Most addresses can choose | 4,945 |
| Santa Rosa | 2,355 | 9 mi | AEP Texas Central | Most addresses can choose | 1,144 |
Business electricity in Harlingen
ERCOT lists 5,349 active business meters with a Harlingen address, about one for every 5.4 homes, and 11 meters in ERCOT’s large non-residential class across Harlingen’s main ZIP codes.
Power Hopper compares offers from retail electric providers and direct suppliers for businesses. For high-consumption businesses, we can run a competitive bid so more than one supplier prices the same usage. 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 Harlingen?
ZIP first, then your address; read each plan’s Electricity Facts Label before choosing.
Common questions about electricity in Harlingen
Can I choose my electricity provider in Harlingen?
For most addresses, yes: 29,141 homes with a Harlingen mailing address are on the competitive market in ERCOT's October 5, 2026 data, against 26,007 Census households in the city. 2 of the ZIP codes touching Harlingen are split (78552, 78586), so check your exact address.
Which Harlingen ZIP code has the most homes on the competitive market?
78550. ERCOT lists 20,941 competitive residential meters there, 20,680 with a Harlingen address, against about 19,733 Census households in the ZIP (ratio 1.06). Among Harlingen's main ZIP codes, 78552 has the fewest competitive meters per household, 0.76.
Which part of Harlingen has the highest electric bills?
It varies by ZIP code. In the Census survey (ACS 2020-2024), 32.2% of households in 78552 reported paying $250 or more a month for electricity, the highest share among Harlingen's main ZIP codes, against 25.7% in 78550. Home size, age and heating type drive much of that, so compare plans at your own usage.
Who do I call in Harlingen when the power goes out?
AEP Texas Central, which delivers to all 29,141 Harlingen-addressed homes in ERCOT's competitive data, not your retail provider. aeptexas.com/outages.
Where to next?
Up: AEP Texas Central area · Cameron County
Nearest town pages: Edinburg · McAllen · Mission · Corpus Christi · Laredo · Victoria · Galveston · Sugar Land
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)
- AEP Texas (Central Division)
- AEP Texas Central delivery tariff (effective September 29, 2026)
- Magic Valley Electric Cooperative
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