Texas City, Texas electricity: TNMP wires, 3 split ZIP codes to check
Texas City is TNMP territory with several split ZIP codes; this page shows, ZIP by ZIP, who can shop and what plans cost.
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 Texas City-addressed home in ERCOT's competitive data is on TNMP's wires (24,149 active residential meters, October 5, 2026). Most Texas City addresses can choose a retail provider, but 3 of the ZIP codes below are split, so check your exact address.
Who delivers electricity in Texas City?
Outages: TNMP at tnmp.com.
TNMP delivery charges and area
Can every address in Texas City choose an electricity provider?
Of the 24,149 Texas City-addressed competitive homes we can place by ZIP code, 2,230 (9%) are in the split ZIP codes 77568, 77539, 77510; 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 counties around Texas City; they are named on Galveston County · Chambers County. Their customers can’t choose unless the utility opted in.
Moving to Texas City
Local numbers for setting up a home in Texas City, each checked on the official source. More contacts, and a printable list, are on Texas City helpful move-in information.
- City hall (ask about water service): City of Texas City: City Hall (main line), 409-948-3111.
- Natural gas: CenterPoint Energy: gas customer service (Houston area), 713-659-2111.
- Public schools: Dickinson ISD, Galveston ISD, Texas City ISD and 2 more on the move-in page.
- Driver license: Texas DPS Driver License Office: Texas 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 Texas 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 Texas City
Typical weather near Texas City, from the nearest NOAA station with a complete 1991-2020 record: Galveston Scholes Field, about 11 miles from the city center (station elevation 5 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 92°F; January has the coolest average low, 49°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 648 for the month, and heating-degree days (below 65°F) peak in January at 290. 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 | 49 | 4.3 | 13 | 290 |
| Feb | 66 | 52 | 2.1 | 24 | 182 |
| Mar | 72 | 58 | 3.0 | 84 | 78 |
| Apr | 78 | 65 | 2.1 | 207 | 12 |
| May | 84 | 72 | 3.0 | 409 | 0 |
| Jun | 90 | 78 | 4.2 | 564 | 0 |
| Jul | 91 | 80 | 3.4 | 636 | 0 |
| Aug | 92 | 80 | 4.7 | 648 | 0 |
| Sep | 89 | 76 | 6.7 | 522 | 0 |
| Oct | 82 | 69 | 5.2 | 328 | 8 |
| Nov | 72 | 59 | 4.3 | 105 | 89 |
| Dec | 66 | 52 | 4.2 | 31 | 230 |
Historical weather records for Galveston County
The Texas Railroad Commission's county table lists a record low of 7°F (1899) and a record high of 106°F (2000), and a regional estimate of 18 consecutive hours as a typical longest freezing or frozen-precipitation period for Galveston County. These are historical county extremes, not Texas 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 Texas City, and not an estimate for your home. EIA source.
Sources: NOAA NCEI U.S. Climate Normals 1991-2020, station USW00012923; Texas Railroad Commission, Historical Weather Data by County (2022).
What is different about electricity in Texas City?
- Census estimates put Texas City at 59,733 residents on July 1, 2025, up 15.2% from a 2020 estimates base of 51,867. Source: Census Bureau.
- ERCOT's daily files added 120 new residential meters in Texas City's main ZIP codes between Oct. 7 and Oct. 18, 2026, 81 of them in 77539. Source: ERCOT daily.
- Texas City-addressed business meters number 2,928 in ERCOT's Oct. 5 extract, one for every 8.2 homes. Source: ERCOT TDSP.
- 49% of Texas City-addressed competitive homes (11,933 of 24,149) are in ZIP 77590, where competitive meters run 0.93 per Census household. Source: ERCOT TDSP; Census ACS.
- Among the 11 cities and towns that touch Galveston County, Texas City ranks 3 by competitive homes on its postal city in ERCOT's data, behind League City (40,501). Source: ERCOT TDSP.
- Renters make up 47.6% of households in 77590, the highest share among Texas City's main ZIP codes (ACS 2020-2024), so many Texas City addresses change hands, and electricity accounts, every year. Source: Census ACS.
Texas City electricity by the numbers
| Measure | Value |
|---|---|
| Population (July 1, 2025 estimate) | 59,733 |
| Population (2020 estimates base) | 51,867 |
| Occupied households (ACS 2020-2024) | 21,845 |
| Active residential meters with a Texas City address | 24,149 |
| Active business meters with a Texas City address | 2,928 |
| Residential meters per Census household | 1.11 |
| Delivery utilities (homes) | TNMP 24,149 |
| Counties | Galveston, Chambers |
| ZIP codes touching Texas City | 6 |
| Split ZIP codes (flagged below) | 3 |
How we built these numbers. Download: Texas City ZIP table (CSV).
What do electricity plans cost in Texas City right now?
Same-day medians for TNMP’s area (TNMP: 166 listings), delivery included; not a quote.
| Delivery utility | 500 kWh | 1,000 kWh | 2,000 kWh | Delivery charge |
|---|---|---|---|---|
| TNMP | 16.1¢ | 15.1¢ | 14.7¢ | 7.771¢/kWh + $7.56/mo (effective September 13, 2026; tariff) |
Texas City 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 Texas City | Competitive homes (ERCOT) | Households (Census) | Ratio | What it means |
|---|---|---|---|---|---|---|
| 77539 | Dickinson 95%, Texas City 5% | 48% | 17,623 | 17,813 | 0.99 | Split. Near-full coverage. Two delivery utilities: TNMP 12,540, CenterPoint 5,083 homes. 81 new residential meters Oct 7-18, 2026. |
| 77590 | Texas City 100% | 98% | 11,933 | 12,900 | 0.93 | Near-full coverage. |
| 77591 | Texas City 100% | 99% | 9,986 | 6,985 | 1.43 | Near-full coverage. |
| 77568 | La Marque 88%, Texas City 12% | 14% | 9,209 | 9,006 | 1.02 | Split. Near-full coverage. Two delivery utilities: TNMP 7,341, CenterPoint 1,868 homes. 22 new residential meters Oct 7-18, 2026. |
| 77510 | Santa Fe 97%, Texas City 3% | 0% | 6,643 | 5,441 | 1.22 | Split. Near-full coverage. Two delivery utilities: CenterPoint 6,413, TNMP 230 homes. Mostly outside Texas City city limits. |
| 77518 | Bacliff 100% | 22% | 3,977 | 3,650 | 1.09 | Near-full coverage. |
Split ZIP codes for Texas City: 77568, 77539, 77510.
Homes, renters and electric bills in Texas City’s ZIP codes
Among Texas City’s main ZIP codes, 77510 has the largest share of households paying $250 or more a month for electricity (52.4%); 77590 has the most renters (47.6% of households); 77568 has the newest housing (9.9% built in 2020 or later).
How do towns near Texas City compare?
Within about 28 miles; whole-place estimates.
| Town | Population | Distance | Delivery utility | Status | Competitive homes (postal city) |
|---|---|---|---|---|---|
| La Marque | 20,324 | 8 mi | TNMP | Most addresses can choose | 8,126 |
| Dickinson | 21,908 | 10 mi | TNMP | Most addresses can choose | 16,662 |
| Kemah | 3,097 | 10 mi | CenterPoint | Most addresses can choose | 4,577 |
| Hitchcock | 7,722 | 13 mi | CenterPoint | Most addresses can choose | 4,895 |
| Seabrook | 13,974 | 13 mi | CenterPoint | Most addresses can choose | 9,699 |
| Santa Fe | 13,913 | 13 mi | CenterPoint | Most addresses can choose | 9,111 |
Business electricity in Texas City
ERCOT lists 2,928 active business meters with a Texas City address, about one for every 8.2 homes, and 37 meters in ERCOT’s large non-residential class across Texas City’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 Texas City?
ZIP first, then your address; read each plan’s Electricity Facts Label before choosing.
Common questions about electricity in Texas City
Can Texas City residents pick their own electric company?
Yes, if TNMP delivers to your address. ERCOT lists 24,149 Texas City-addressed homes on the competitive market (October 5, 2026), about 1.11 per Census household. 3 of the ZIP codes touching Texas City are split (77568, 77539, 77510), so check your exact address.
What is the biggest Texas City ZIP code for electricity customers?
77590. ERCOT lists 11,933 competitive residential meters there, 11,933 with a Texas City address, against about 12,900 Census households in the ZIP (ratio 0.93).
Are electric bills high in Texas City?
It varies by ZIP code. In the Census survey (ACS 2020-2024), 52.4% of households in 77510 reported paying $250 or more a month for electricity, the highest share among Texas City's main ZIP codes, against 29.7% in 77568. Home size, age and heating type drive much of that, so compare plans at your own usage.
Why does my Texas City home have a Dickinson address?
ZIP 77539 is shared. In ERCOT's data, 95% of its 17,623 competitive residential meters use Dickinson as the postal city and 5% use Texas City. Mailing city and city limits are different things; the service address decides which utility serves you.
Who do I call in Texas City when the power goes out?
TNMP, which delivers to all 24,149 Texas City-addressed homes in ERCOT's competitive data, not your retail provider. tnmp.com.
Where to next?
Up: TNMP area · Galveston County · Chambers County
Nearest town pages: League City · Galveston · Pasadena · Baytown · Pearland · Missouri City · Sugar Land · Victoria
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)
- TNMP delivery tariff (effective September 13, 2026)
BJW Ventures LLC d/b/a Power Hopper | PUCT BR260201. PUCT registration is not an endorsement.