Jarrell, Texas electricity: Oncor wires, 2 split ZIP codes to check
Jarrell: 5,870 residents, 1,124 households in the Census survey and 5,436 competitive home meters on its postal city. Here is who delivers the power, which addresses can shop and what plans cost on Oncor's wires.
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: ERCOT counts 5,436 active residential meters with a Jarrell address, all on Oncor's wires (October 5, 2026). 2 of Jarrell's ZIP codes are split, so most addresses can shop, but yours needs a check.
Who delivers electricity in Jarrell?
Outages: Oncor at oncor.com/outages.
Oncor delivery charges and area
Can every address in Jarrell choose an electricity provider?
Split ZIP codes holding Jarrell homes: 78633, 78626. They carry 0 of the 5,435 competitive homes with a Jarrell address (0%); on those streets a neighbor's utility can differ from yours.
Without retail choice unless opted in: 3 other utilities in Williamson County (EIA 2024).
Moving to Jarrell
Local numbers for setting up a home in Jarrell, each checked on the official source. More contacts, and a printable list, are on Jarrell helpful move-in information.
- City hall (ask about water service): City of Jarrell: City Hall (main line), 512-746-4593.
- Natural gas: Atmos Energy: customer service, 888-286-6700.
- Public schools: Jarrell ISD.
- Driver license: Texas DPS Driver License Office: Georgetown, 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 Jarrell 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 Jarrell
Typical weather near Jarrell, from the nearest NOAA station with a complete 1991-2020 record: Georgetown Lake, about 11 miles from the city center (station elevation 874 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 97°F; January has the coolest average low, 36°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 601 for the month, and heating-degree days (below 65°F) peak in January at 522. 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 | 60 | 36 | 2.5 | 3 | 522 |
| Feb | 65 | 40 | 2.2 | 10 | 364 |
| Mar | 72 | 47 | 3.1 | 40 | 215 |
| Apr | 79 | 54 | 3.0 | 112 | 70 |
| May | 85 | 63 | 4.3 | 301 | 9 |
| Jun | 92 | 70 | 4.0 | 473 | 0 |
| Jul | 96 | 72 | 2.2 | 591 | 0 |
| Aug | 97 | 72 | 2.6 | 601 | 0 |
| Sep | 90 | 67 | 4.0 | 402 | 3 |
| Oct | 81 | 57 | 3.9 | 179 | 53 |
| Nov | 70 | 46 | 2.7 | 33 | 241 |
| Dec | 62 | 38 | 2.6 | 5 | 472 |
Historical weather records for Williamson County
The Texas Railroad Commission's county table lists a record low of -5°F (1949) and a record high of 113°F (1917), and a regional estimate of 24 consecutive hours as a typical longest freezing or frozen-precipitation period for Williamson County. These are historical county extremes, not Jarrell'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 Jarrell, and not an estimate for your home. EIA source.
Sources: NOAA NCEI U.S. Climate Normals 1991-2020, station USC00413507; Texas Railroad Commission, Historical Weather Data by County (2022).
What is different about electricity in Jarrell?
- ERCOT's data has no postal city for Sonterra (a census-designated place of about 10,563 residents, ACS 2020-2024), mostly in ZIP 76537. Those homes use Jarrell mailing addresses, so residents there can use this page's ZIP table; there is no separate page for Sonterra. (ERCOT, Census, Census)
- The Census Bureau's July 1, 2025 estimate for Jarrell is 5,870 people, up 238.9% on the 2020 estimates base of 1,732. The largest one-year change was +1,288 people, from July 2021 to July 2022. July 1 estimates in between: 2,099 (2021), 3,387 (2022), 3,987 (2023), 5,145 (2024). (Census)
- Jarrell covers 3.7 square miles of land (Census 2025 Gazetteer). That works out to about 1,605 residents and 307 occupied households per square mile of land, with roughly 5.2 residents for every Jarrell household. (Census, Census, Census)
- Mailing addresses stretch past city limits here. 5,436 competitive residential meters use Jarrell as their postal city, while the city itself has 1,124 Census households, a ratio of 4.84. Because Jarrell has grown 239 percent since the 2020 base, the ACS 2020-2024 household figure likely runs behind today's count. (ERCOT, Census)
- Of the 3,564,530 homes Oncor serves on the competitive market, 0.2% have a Jarrell mailing address. (ERCOT)
- Move-ins show up as vacant-to-active switches in ERCOT's daily files: 22 of them in the ZIP codes most Jarrell homes use, Oct. 7-18, 2026. (ERCOT)
- On October 5, 2026, ERCOT showed 678 home meters switched off (de-energized) in the ZIP codes most Jarrell homes use, against 5,530 switched on; that 10.9 percent is mostly vacant houses and apartments between occupants. (ERCOT)
- One ZIP code, 76537, holds almost every Jarrell-addressed competitive home (5,435); it also carries 92 Taylor addresses. Taken whole, 76537 has 1.02 competitive meters per Census household: 5,530 meters, 5,448 households. (ERCOT, Census)
- Among the 14 cities and towns that reach into Williamson County, Jarrell places 7 for competitive homes on its postal city; the next one up is Taylor, at 9,352. (ERCOT)
- By the Census Bureau's 2025 estimates, Jarrell is the number 10 city or town by population among the 17 that reach into Williamson County, one place ahead of Bartlett (1,678 residents). (Census)
- Mailing cities on the 5,530 competitive home meters in 76537, Jarrell's main ZIP code: Jarrell 5,435, Taylor 92. A mailing city is not a city limit, so the service address, not the postal name, settles which utility serves a home. (ERCOT)
- Electric bills over $250 a month: 25.2 percent of households in 76537, Jarrell's main ZIP code, per the ACS 2020-2024; the same survey puts median household income there at $98,199 and the renter share at 20.5 percent. (Census)
Jarrell electricity by the numbers
| Measure | Value |
|---|---|
| Population (July 1, 2025 estimate) | 5,870 |
| Population (2020 estimates base) | 1,732 |
| Occupied households (ACS 2020-2024) | 1,124 |
| Active residential meters with a Jarrell address | 5,436 |
| Active business meters with a Jarrell address | 389 |
| Residential meters per Census household | 4.84 |
| Delivery utilities (homes) | Oncor 5,436 |
| Counties | Williamson |
| ZIP codes touching Jarrell | 3 |
| Split ZIP codes (flagged below) | 2 |
How we built these numbers. Download: Jarrell ZIP table (CSV).
What do electricity plans cost in Jarrell right now?
Same-day medians for Oncor’s area (Oncor: 170 listings), delivery included; not a quote.
| Delivery utility | 500 kWh | 1,000 kWh | 2,000 kWh | Delivery charge |
|---|---|---|---|---|
| Oncor | 14.1¢ | 13.4¢ | 13.2¢ | 6.8673¢/kWh + $4.06/mo (effective October 4, 2026; tariff) |
Jarrell 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 | Meters per household | ERCOT competitive homes | Census households | With Jarrell address | Share of ZIP land in Jarrell | Mailing cities | Reading |
|---|---|---|---|---|---|---|---|
| 78626 | 0.69 | 11,605 | 16,813 | 0 | 0% | Georgetown 99%, Round Rock 1% | Split. Most homes, not all. Split: City of Georgetown (Georgetown city limits cover about 23% of the ZIP's land); that utility's customers can't choose. 16 new residential meters Oct 7-18, 2026. Mostly outside Jarrell city limits. |
| 76537 | 1.02 | 5,530 | 5,448 | 5,435 | 5% | Jarrell 98%, Taylor 2% | Near-full coverage. Mostly outside Jarrell city limits. |
| 78633 | 0.00 | 67 | 14,245 | 0 | 0% | Georgetown 66%, Copperas Cove 33%, Round Rock 1% | Split. Little coverage. Split: City of Georgetown (Georgetown city limits cover about 22% of the ZIP's land); that utility's customers can't choose. Mostly outside Jarrell city limits. |
Split ZIP codes for Jarrell: 78633, 78626.
Homes, renters and electric bills in Jarrell’s ZIP codes
ZIP 76537 leads Jarrell on electric bills over $250 a month, reported by 25.2 percent of its households; 76537 the most homes built since 2020, 28.7 percent (Census ACS 2020-2024).
| ZIP | Bills $250+ | Household income (median) | Built since 2020 | Jarrell-addressed homes | Renting | Meters added Oct 7-18 | In 5+ unit buildings | Vacant-to-active switches |
|---|---|---|---|---|---|---|---|---|
| 76537 | 25.2% | $98,199 | 28.7% | 5,435 | 20.5% | 8 | 1.4% | 22 |
ACS 2020-2024 by ZCTA; meters: ERCOT daily files, Oct 7-18, 2026.
Jarrell and its neighbors
| Nearby town (2,000+ residents) | Wires utility | Can homes choose? | Postal-city meters per household | Distance | Competitive homes, postal city |
|---|---|---|---|---|---|
| Salado | Oncor | Yes, mostly | 4.86 | 11 mi away | 4,474 homes |
| Georgetown | Oncor | Some; city utility elsewhere | 0.33 | 11 mi away | 11,520 homes |
| Harker Heights | Oncor | Yes, mostly | 0.98 | 17 mi away | 12,170 homes |
| Nolanville | Oncor | Yes, mostly | 1.24 | 18 mi away | 3,338 homes |
| Belton | Oncor | Yes, mostly | 2.01 | 19 mi away | 16,718 homes |
| Hutto | Oncor | Yes, mostly | 1.98 | 19 mi away | 23,298 homes |
Business electricity in Jarrell
Jarrell business meters: 389 (14.0 homes per business meter); large non-residential meters in Jarrell’s main ZIP codes: 0 (ERCOT, October 5, 2026).
Larger accounts can go out to bid with retail providers and direct suppliers; we can’t promise savings or bids.
How do I compare electricity plans in Jarrell?
ZIP first, then your address; read each plan’s Electricity Facts Label before choosing.
Common questions about electricity in Jarrell
I live in Sonterra. Which electricity page covers me?
Use this Jarrell page. Sonterra has no postal city of its own in ERCOT's data; its homes carry Jarrell addresses. In ZIP 76537, ERCOT lists 5,530 competitive residential meters against about 5,448 Census households (ratio 1.02). Check your exact address.
Is Jarrell deregulated for electricity?
Yes, where Oncor's wires reach the house, which in Jarrell is most of the city: 5,436 homes with a Jarrell mailing address were on the competitive market on October 5, 2026, 4.84 for each Census household. Addresses in 78633, 78626 (all split) need an exact-address check before you shop.
Which Jarrell ZIP code has the most homes on the competitive market?
That is 76537, home to 5,435 of the competitive meters with a Jarrell address. ZIP-wide: 5,530 ERCOT meters, about 5,448 Census households, 1.02 per household.
How much is electricity in Jarrell right now?
On October 19, 2026, the median fixed-rate Power to Choose listing on Oncor's wires was 13.4¢ per kWh at 1,000 kWh a month (170 listings); Oncor's delivery charge of 6.8673¢ per kWh plus $4.06 a month is included. A median is not a quote.
I'm moving to Jarrell. How do I set up electricity?
Confirm the address is on Oncor's wires, then pick a plan and a start date. In 76537, 15.0% of residents moved in the past year (ACS); 22 meters in 76537 went vacant-to-active Oct. 7-18, 2026.
Why are there more electric meters than households in Jarrell?
5,436 Jarrell-addressed meters against 1,124 city households is 4.84 per household: the Jarrell 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: Oncor area · Williamson County
Nearest town pages: Harker Heights · Nolanville · Belton · Hutto · Killeen · Taylor · Round Rock · Temple
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)
- Oncor Electric Delivery
- Oncor delivery tariff (effective October 4, 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.