Alvin, Texas electricity: TNMP wires, 1 split ZIP code to check
Two questions decide electricity in Alvin: whose wires reach your street, and what plans on TNMP's system cost right now. This page answers both from ERCOT, Census and PUCT data.
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: Alvin homes in ERCOT's competitive data are on TNMP's wires (15,752) and CenterPoint's wires (6,210). 1 of Alvin's ZIP codes is split, so most addresses can shop, but yours needs a check.
Who delivers electricity in Alvin?
Outages: TNMP at tnmp.com.
TNMP delivery charges and area · CenterPoint delivery charges and area
Can every address in Alvin choose an electricity provider?
21,962 of 21,962 Alvin-addressed competitive homes (100%) are in split ZIP codes (77511), where a neighbor may have a different utility.
1 more utility (co-op, city-owned or non-ERCOT; EIA 2024) also serves parts of Brazoria County; no retail choice there unless the utility opted in.
Moving to Alvin
Local numbers for setting up a home in Alvin, each checked on the official source. More contacts, and a printable list, are on Alvin helpful move-in information.
- Water and utility billing: utility billing (start, transfer or stop water service), 281-388-4264.
- Natural gas: CenterPoint Energy: gas customer service (Houston area), 713-659-2111.
- Public schools: Alvin ISD, Angleton ISD.
- Driver license: Texas DPS Driver License Office: League 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 Alvin 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 Alvin
Typical weather near Alvin, from the nearest NOAA station with a complete 1991-2020 record: Alvin, about 4 miles from the city center (station elevation 28 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 91°F; January has the coolest average low, 44°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 544 for the month, and heating-degree days (below 65°F) peak in January at 369. 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 | 63 | 44 | 4.9 | 9 | 369 |
| Feb | 67 | 48 | 3.0 | 21 | 239 |
| Mar | 73 | 54 | 3.1 | 67 | 121 |
| Apr | 78 | 60 | 4.2 | 148 | 37 |
| May | 85 | 68 | 4.6 | 346 | 2 |
| Jun | 89 | 72 | 6.0 | 469 | 0 |
| Jul | 91 | 74 | 4.2 | 541 | 0 |
| Aug | 91 | 74 | 5.6 | 544 | 0 |
| Sep | 89 | 70 | 5.4 | 434 | 1 |
| Oct | 81 | 61 | 5.3 | 211 | 25 |
| Nov | 73 | 52 | 4.3 | 61 | 151 |
| Dec | 65 | 45 | 4.5 | 17 | 329 |
Historical weather records for Brazoria County
The Texas Railroad Commission's county table lists a record low of 5°F (1899) and a record high of 109°F (2000), and a regional estimate of 18 consecutive hours as a typical longest freezing or frozen-precipitation period for Brazoria County. These are historical county extremes, not Alvin'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 Alvin, and not an estimate for your home. EIA source.
Sources: NOAA NCEI U.S. Climate Normals 1991-2020, station USC00410204; Texas Railroad Commission, Historical Weather Data by County (2022).
What is different about electricity in Alvin?
- Population: 26,957 (2020 base) to 30,115 (July 2025), +11.7%, per Census Vintage 2025 estimates. The largest one-year change was +985 people, from July 2023 to July 2024. (Census)
- The Alvin mailing area is bigger than the city: ERCOT lists 21,962 competitive homes under the Alvin postal city, 2.1 for each of the city's 10,456 Census households. (ERCOT, Census)
- Alvin-addressed homes make up 9.1% of the 242,585 residential meters on TNMP's competitive system. (ERCOT)
- Alvin is still adding homes: 10 new residential meters in its main ZIP codes during Oct. 7-18, 2026 (most in 77511: 10), plus 42 vacant-to-active switches. (ERCOT)
- Alvin's main ZIP codes: 21,973 active and 1,337 de-energized residential meters (5.7% de-energized, usually empty or between tenants). (ERCOT)
- Nearly all Alvin-addressed competitive homes (21,962) are in one ZIP code, 77511. ZIP-wide, ERCOT counts 21,973 competitive meters for 17,866 Census households, a 1.23 ratio. (ERCOT, Census)
- By competitive homes on its postal city, Alvin is number 2 of the 17 cities and towns touching Brazoria County, just behind Pearland (54,288). (ERCOT)
- In 77511, the ZIP holding most Alvin homes, the ACS 2020-2024 survey finds a median household income of $74,939, 28.7% renters and 37.4% of households with $250+ monthly electric bills. (Census)
- Alvin's land splits across 2 main ZIP codes, led by 77511 (67%) and 77583 (29%), per the Census 2020 ZCTA-to-place relationship file. (Census)
- Of Alvin's six nearest towns, League City has the most competitive homes (40,501, 8 mi away) and League City the fewest per household (0.94). (ERCOT, Census)
Alvin electricity by the numbers
| Measure | Value |
|---|---|
| Population (July 1, 2025 estimate) | 30,115 |
| Population (2020 estimates base) | 26,957 |
| Occupied households (ACS 2020-2024) | 10,456 |
| Active residential meters with an Alvin address | 21,962 |
| Active business meters with an Alvin address | 3,390 |
| Residential meters per Census household | 2.1 |
| Delivery utilities (homes) | TNMP 15,752; CenterPoint 6,210 |
| Counties | Brazoria |
| ZIP codes touching Alvin | 2 |
| Split ZIP codes (flagged below) | 1 |
How we built these numbers. Download: Alvin ZIP table (CSV).
What do electricity plans cost in Alvin right now?
Same-day medians for TNMP’s area (TNMP: 166; CenterPoint: 173 listings), delivery included; not a quote.
Alvin 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 | Alvin homes | Land in Alvin | Postal cities | Competitive homes (ERCOT) | Households (Census) | Ratio | What it means |
|---|---|---|---|---|---|---|---|
| 77583 | 0 | 4% | Rosharon 100% | 23,272 | 14,976 | 1.55 | Near-full coverage. 168 new residential meters Oct 7-18, 2026. Mostly outside Alvin city limits. |
| 77511 | 21,962 | 11% | Alvin 100% | 21,973 | 17,866 | 1.23 | Split. Near-full coverage. Two delivery utilities: TNMP 15,762, CenterPoint 6,211 homes. 10 new residential meters Oct 7-18, 2026. |
Split ZIP codes for Alvin: 77511.
Homes, renters and electric bills in Alvin’s ZIP codes
$250+ monthly electric bills peak in 77511 (37.4% of households).
| ZIP | Alvin homes | Median income | Renters | 5+ units | $250+ bills | Built 2020+ | New meters | Vacant to active |
|---|---|---|---|---|---|---|---|---|
| 77511 | 21,962 | $74,939 | 28.7% | 10.7% | 37.4% | 3.1% | 10 | 42 |
ACS 2020-2024 by ZCTA; meters: ERCOT daily files, Oct 7-18, 2026.
How do towns near Alvin compare?
| Town (2,000+ people) | Miles | Competitive homes | Per household | Utility | Status |
|---|---|---|---|---|---|
| Friendswood | 6 mi | 20,428 | 1.37 | TNMP | Most addresses can choose |
| Santa Fe | 8 mi | 9,111 | 1.94 | CenterPoint | Most addresses can choose |
| League City | 8 mi | 40,501 | 0.94 | TNMP | Most addresses can choose |
| Manvel | 10 mi | 14,114 | 2.91 | CenterPoint | Most addresses can choose |
| Webster | 10 mi | 12,856 | 2.15 | CenterPoint | Most addresses can choose |
| Dickinson | 10 mi | 16,662 | 2.16 | TNMP | Most addresses can choose |
Business electricity in Alvin
Alvin business meters: 3,390 (6.5 homes per business meter); large non-residential meters in Alvin’s main ZIP codes: 11 (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 Alvin?
ZIP first, then your address; read each plan’s Electricity Facts Label before choosing.
Common questions about electricity in Alvin
Can I choose my electricity provider in Alvin?
Yes, where TNMP or CenterPoint's wires reach the house, which in Alvin is most of the city: 21,962 homes with an Alvin mailing address were on the competitive market on October 5, 2026, 2.1 for each Census household. Split ZIP codes for Alvin: 77511; on those, check the exact address.
What is the biggest Alvin ZIP code for electricity customers?
ZIP 77511: 21,962 of its 21,973 competitive residential meters use an Alvin address, and the ZIP has about 17,866 Census households (ratio 1.23).
Can businesses in Alvin choose an electricity provider?
Yes, where TNMP delivers: 3,390 Alvin-addressed business meters are on the competitive market in ERCOT's data, and large accounts can also buy from commercial suppliers directly.
I'm moving to Alvin. How do I set up electricity?
Start with the address check: TNMP-delivered Alvin homes choose among the plans offered there and set a start date. Turnover is real in 77511, where 8.4% moved in the past year (ACS); ERCOT logged 42 vacant-to-active meters in 77511 Oct. 7-18, 2026.
Why does my Alvin home have a Rosharon address?
Because ZIP 77583 is mostly addressed to Rosharon: 100% of its 23,272 competitive residential meters use that postal city, and almost none use Alvin. Mailing city isn't city limits; the service address decides the utility.
Why are there more electric meters than households in Alvin?
21,962 Alvin-addressed meters against 10,456 city households is 2.1 per household: the Alvin 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 to next?
Up: TNMP area · CenterPoint area · Brazoria County
Nearest town pages: Friendswood · League City · Manvel · Dickinson · Pearland · La Marque · South Houston · Pasadena
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)
- Texas-New Mexico Power (TNMP)
- CenterPoint Energy Houston Electric
- TNMP delivery tariff (effective September 13, 2026)
- CenterPoint delivery tariff (effective October 1, 2026)
BJW Ventures LLC d/b/a Power Hopper | PUCT BR260201. PUCT registration is not an endorsement.