Lewisville, Texas electricity: TNMP wires, 2 split ZIP codes to check
Most questions about electricity in Lewisville come down to two things: whose wires reach your street, and what plans on TNMP's system 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: Lewisville homes in ERCOT's competitive data are on TNMP's wires (44,210) and Oncor's wires (323). Most Lewisville addresses can choose a retail provider, but 2 of the ZIP codes below are split, so check your exact address.
Who delivers electricity in Lewisville?
Outages: TNMP at tnmp.com.
TNMP delivery charges and area · Oncor delivery charges and area
Can every address in Lewisville choose an electricity provider?
Of the 44,533 Lewisville-addressed competitive homes we can place by ZIP code, 8,998 (20%) are in the split ZIP codes 75077, 75056; on those streets, a neighbor may be on a different utility. The ZIP table below marks each one.
EIA’s 2024 data lists 7 other utilities (co-ops, city-owned or outside ERCOT) in the counties around Lewisville; they are named on Denton County · Dallas County. Their customers can’t choose unless the utility opted in.
Moving to Lewisville
Local numbers for setting up a home in Lewisville, each checked on the official source. More contacts, and a printable list, are on Lewisville helpful move-in information.
- Water and utility billing: utility billing (start, transfer or stop water service), 972-219-3440.
- Trash pickup: Republic Services: trash and recycling, 972-316-0789.
- Natural gas: Atmos Energy: customer service, 888-286-6700.
- Public schools: Lewisville ISD.
- Driver license: Texas DPS Driver License Office: Lewisville, 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 Lewisville 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 Lewisville
Typical weather near Lewisville, from the nearest NOAA station with a complete 1991-2020 record: Grapevine Dam, about 8 miles from the city center (station elevation 585 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, 34°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 614 for the month, and heating-degree days (below 65°F) peak in January at 625. 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 | 56 | 34 | 2.6 | 2 | 625 |
| Feb | 60 | 38 | 2.7 | 5 | 444 |
| Mar | 68 | 45 | 3.6 | 28 | 290 |
| Apr | 75 | 54 | 3.5 | 84 | 102 |
| May | 83 | 63 | 4.7 | 255 | 18 |
| Jun | 91 | 71 | 3.8 | 479 | 0 |
| Jul | 95 | 74 | 2.3 | 611 | 0 |
| Aug | 96 | 74 | 2.1 | 614 | 0 |
| Sep | 89 | 67 | 3.5 | 385 | 6 |
| Oct | 78 | 55 | 4.5 | 140 | 86 |
| Nov | 66 | 45 | 2.8 | 21 | 306 |
| Dec | 58 | 36 | 2.9 | 3 | 561 |
Historical weather records for Denton County
The Texas Railroad Commission's county table lists a record low of -6°F (2021) and a record high of 113°F (1954), and a regional estimate of 30 consecutive hours as a typical longest freezing or frozen-precipitation period for Denton County. These are historical county extremes, not Lewisville'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 Lewisville, and not an estimate for your home. EIA source.
Sources: NOAA NCEI U.S. Climate Normals 1991-2020, station USC00413691; Texas Railroad Commission, Historical Weather Data by County (2022).
What is different about electricity in Lewisville?
- EIA's 2024 data lists CoServ Electric (Denton County Electric Cooperative, 298,734 residential customers) in Collin and Denton counties, along with other co-ops; co-op members are not on the competitive market. Source: EIA-861 (2024); CoServ: About.
- Census estimates put Lewisville at 139,006 residents on July 1, 2025, up 10.6% from a 2020 estimates base of 125,664. Source: Census Bureau.
- Lewisville-addressed business meters number 6,544 in ERCOT's Oct. 5 extract, one for every 6.8 homes. Source: ERCOT TDSP.
- 61% of Lewisville-addressed competitive homes (27,221 of 44,533) are in ZIP 75067, where competitive meters run 0.99 per Census household. Source: ERCOT TDSP; Census ACS.
- Among the 36 cities and towns that touch Denton County, Lewisville ranks 5 by competitive homes on its postal city in ERCOT's data, behind Dallas (535,270). Source: ERCOT TDSP.
- Renters make up 64.3% of households in 75057, the highest share among Lewisville's main ZIP codes (ACS 2020-2024), so many Lewisville addresses change hands, and electricity accounts, every year. Source: Census ACS.
Lewisville electricity by the numbers
| Measure | Value |
|---|---|
| Population (July 1, 2025 estimate) | 139,006 |
| Population (2020 estimates base) | 125,664 |
| Occupied households (ACS 2020-2024) | 51,915 |
| Active residential meters with a Lewisville address | 44,533 |
| Active business meters with a Lewisville address | 6,544 |
| Residential meters per Census household | 0.86 |
| Delivery utilities (homes) | TNMP 44,210; Oncor 323 |
| Counties | Denton, Dallas |
| ZIP codes touching Lewisville | 4 |
| Split ZIP codes (flagged below) | 2 |
How we built these numbers. Download: Lewisville ZIP table (CSV).
What do electricity plans cost in Lewisville right now?
Same-day medians for TNMP’s area (TNMP: 166; Oncor: 170 listings), delivery included; not a quote.
Lewisville 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 Lewisville | Competitive homes (ERCOT) | Households (Census) | Ratio | What it means |
|---|---|---|---|---|---|---|
| 75067 | Lewisville 100% | 93% | 27,221 | 27,473 | 0.99 | Near-full coverage. Two delivery utilities: TNMP 26,898, Oncor 323 homes. |
| 75056 | The Colony 100% | 29% | 14,498 | 28,020 | 0.52 | Split. Partial coverage. |
| 75077 | Lewisville 100% | 29% | 8,998 | 15,147 | 0.59 | Split. Partial coverage. |
| 75057 | Lewisville 100% | 98% | 8,314 | 7,060 | 1.18 | Near-full coverage. |
Split ZIP codes for Lewisville: 75077, 75056.
Homes, renters and electric bills in Lewisville’s ZIP codes
Among Lewisville’s main ZIP codes, 75077 has the largest share of households paying $250 or more a month for electricity (45.5%); 75057 has the most renters (64.3% of households).
How do towns near Lewisville compare?
Within about 28 miles; whole-place estimates.
| Town | Population | Distance | Delivery utility | Status | Competitive homes (postal city) |
|---|---|---|---|---|---|
| The Colony | 46,196 | 5 mi | Oncor | Most addresses can choose | 14,498 |
| Hickory Creek | 6,875 | 5 mi | Oncor | Most addresses can choose | 2,675 |
| Highland Village | 16,029 | 6 mi | TNMP | Partly | 0 |
| Lake Dallas | 7,852 | 6 mi | Oncor | Most addresses can choose | 3,175 |
| Carrollton | 134,562 | 6 mi | Oncor | Most addresses can choose | 46,863 |
| Coppell | 41,386 | 6 mi | Oncor | Most addresses can choose | 15,016 |
Business electricity in Lewisville
ERCOT lists 6,544 active business meters with a Lewisville address, about one for every 6.8 homes, and 24 meters in ERCOT’s large non-residential class across Lewisville’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 Lewisville?
ZIP first, then your address; read each plan’s Electricity Facts Label before choosing.
Common questions about electricity in Lewisville
Can Lewisville residents pick their own electric company?
For most addresses, yes: 44,533 homes with a Lewisville mailing address are on the competitive market in ERCOT's October 5, 2026 data, against 51,915 Census households in the city. 2 of the ZIP codes touching Lewisville are split (75077, 75056), so check your exact address.
What is the biggest Lewisville ZIP code for electricity customers?
75067. ERCOT lists 27,221 competitive residential meters there, 27,221 with a Lewisville address, against about 27,473 Census households in the ZIP (ratio 0.99). Among Lewisville's main ZIP codes, 75077 has the fewest competitive meters per household, 0.59.
How many Lewisville households have a $250 electric bill?
It varies by ZIP code. In the Census survey (ACS 2020-2024), 45.5% of households in 75077 reported paying $250 or more a month for electricity, the highest share among Lewisville's main ZIP codes, against 25.3% in 75057. Home size, age and heating type drive much of that, so compare plans at your own usage.
Why does my Lewisville home have a The Colony address?
ZIP 75056 is shared. In ERCOT's data, 100% of its 14,498 competitive residential meters use The Colony as the postal city and almost none use Lewisville. Mailing city and city limits are different things; the service address decides which utility serves you.
Who do I call in Lewisville when the power goes out?
Your delivery utility, which in Lewisville depends on the street: ERCOT shows Lewisville homes on TNMP (44,210) and Oncor (323). Your retail provider cannot restore power.
Where to next?
Up: TNMP area · Oncor area · Denton County · Dallas County
Nearest town pages: Grapevine · Frisco · Trophy Club · Plano · Irving · Roanoke · Euless · Richardson
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)
- Oncor Electric Delivery
- TNMP delivery tariff (effective September 13, 2026)
- Oncor delivery tariff (effective October 4, 2026)
- CoServ: About (history: Denton County Electric Cooperative, founded 1937; 400,000+ combined electric and gas meters by Dec. 2020)
BJW Ventures LLC d/b/a Power Hopper | PUCT BR260201. PUCT registration is not an endorsement.