Rockdale, Texas electricity: Oncor wires, 1 split ZIP code to check
Rockdale: 5,688 residents, 2,191 households in the Census survey and 2,912 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 2,912 active residential meters with a Rockdale address, all on Oncor's wires (October 5, 2026). 1 of Rockdale's ZIP codes is split, so most addresses can shop, but yours needs a check.
Who delivers electricity in Rockdale?
Outages: Oncor at oncor.com/outages.
Oncor delivery charges and area
Can every address in Rockdale choose an electricity provider?
Split ZIP codes holding Rockdale homes: 76567. They carry 2,910 of the 2,910 competitive homes with a Rockdale address (100%); on those streets a neighbor's utility can differ from yours.
Without retail choice unless opted in: 4 other utilities in Milam County (EIA 2024).
Moving to Rockdale
Local numbers for setting up a home in Rockdale, each checked on the official source. More contacts, and a printable list, are on Rockdale helpful move-in information.
- City hall (ask about water service): City of Rockdale: City Hall (main line), 512-446-2511.
- Natural gas: Atmos Energy: customer service, 888-286-6700.
- Public schools: Rockdale ISD.
- Driver license: Texas DPS Driver License Office: Cameron, 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 Rockdale 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 Rockdale
Typical weather near Rockdale, from the nearest NOAA station with a complete 1991-2020 record: Cameron, about 13 miles from the city center (station elevation 364 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 95°F; January has the coolest average low, 39°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 581 for the month, and heating-degree days (below 65°F) peak in January at 478. 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 | 61 | 39 | 2.6 | 6 | 478 |
| Feb | 66 | 43 | 2.4 | 20 | 311 |
| Mar | 72 | 50 | 2.9 | 53 | 177 |
| Apr | 78 | 57 | 2.3 | 136 | 59 |
| May | 85 | 65 | 5.3 | 313 | 6 |
| Jun | 91 | 72 | 3.6 | 489 | 0 |
| Jul | 94 | 73 | 2.6 | 566 | 0 |
| Aug | 95 | 73 | 2.5 | 581 | 0 |
| Sep | 90 | 68 | 3.9 | 415 | 1 |
| Oct | 81 | 57 | 4.3 | 179 | 50 |
| Nov | 71 | 48 | 3.1 | 47 | 212 |
| Dec | 63 | 41 | 3.1 | 16 | 414 |
Historical weather records for Milam County
The Texas Railroad Commission's county table lists a record low of -7°F (1930) and a record high of 114°F (1917), and a regional estimate of 18 consecutive hours as a typical longest freezing or frozen-precipitation period for Milam County. These are historical county extremes, not Rockdale'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 Rockdale, and not an estimate for your home. EIA source.
Sources: NOAA NCEI U.S. Climate Normals 1991-2020, station USC00411348; Texas Railroad Commission, Historical Weather Data by County (2022).
What is different about electricity in Rockdale?
- Population: 5,294 (2020 base) to 5,688 (July 2025), +7.4%, per Census Vintage 2025 estimates. The largest one-year change was +135 people, from July 2020 to July 2021. July 1 estimates in between: 5,431 (2021), 5,524 (2022), 5,596 (2023), 5,618 (2024). (Census)
- Rockdale covers 4.3 square miles of land (Census 2025 Gazetteer). That works out to about 1,327 residents and 511 occupied households per square mile of land, with roughly 2.6 residents for every Rockdale household. (Census, Census, Census)
- Mailing addresses stretch past city limits here. 2,912 competitive residential meters use Rockdale as their postal city, while the city itself has 2,191 Census households, a ratio of 1.33. (ERCOT, Census)
- Oncor delivers to 3,564,530 competitive homes in all; the 2,912 with a Rockdale address are 0.08 percent of them, roughly one in 1,224. (ERCOT)
- On October 5, 2026, ERCOT showed 527 home meters switched off (de-energized) in the ZIP codes most Rockdale homes use, against 2,918 switched on; that 15.3 percent is mostly vacant houses and apartments between occupants. (ERCOT)
- One ZIP code, 76567, holds almost every Rockdale-addressed competitive home (2,910). Taken whole, 76567 has 0.79 competitive meters per Census household: 2,918 meters, 3,717 households. (ERCOT, Census)
- Rockdale is 1 of 5 on a Milam County list of cities and towns ranked by postal-city competitive homes; second place is Cameron, at 2,817. (ERCOT)
- By the Census Bureau's 2025 estimates, Rockdale is the number 1 city or town by population among the 5 that reach into Milam County, one place ahead of Cameron (5,489 residents). (Census)
- Electric bills over $250 a month: 37.4 percent of households in 76567, Rockdale's main ZIP code, per the ACS 2020-2024; the same survey puts median household income there at $69,983 and the renter share at 24.3 percent. (Census)
Rockdale electricity by the numbers
| Measure | Value |
|---|---|
| Population (July 1, 2025 estimate) | 5,688 |
| Population (2020 estimates base) | 5,294 |
| Occupied households (ACS 2020-2024) | 2,191 |
| Active residential meters with a Rockdale address | 2,912 |
| Active business meters with a Rockdale address | 734 |
| Residential meters per Census household | 1.33 |
| Delivery utilities (homes) | Oncor 2,912 |
| Counties | Milam |
| ZIP codes touching Rockdale | 1 |
| Split ZIP codes (flagged below) | 1 |
How we built these numbers. Download: Rockdale ZIP table (CSV).
What do electricity plans cost in Rockdale 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) |
Rockdale 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 Rockdale address | Share of ZIP land in Rockdale | Mailing cities | Reading |
|---|---|---|---|---|---|---|---|
| 76567 | 0.79 | 2,918 | 3,717 | 2,910 | 2% | Rockdale 100% | Split. Most homes, not all. Mostly outside Rockdale city limits. |
Split ZIP codes for Rockdale: 76567.
Homes, renters and electric bills in Rockdale’s ZIP codes
ZIP 76567 leads Rockdale on electric bills over $250 a month, reported by 37.4 percent of its households (Census ACS 2020-2024).
| ZIP | Bills $250+ | Household income (median) | Built since 2020 | Rockdale-addressed homes | Renting | Meters added Oct 7-18 | In 5+ unit buildings | Vacant-to-active switches |
|---|---|---|---|---|---|---|---|---|
| 76567 | 37.4% | $69,983 | 1.8% | 2,910 | 24.3% | 2 | 1.9% | 7 |
ACS 2020-2024 by ZCTA; meters: ERCOT daily files, Oct 7-18, 2026.
Rockdale and its neighbors
| Nearby town (2,000+ residents) | Wires utility | Can homes choose? | Postal-city meters per household | Distance | Competitive homes, postal city |
|---|---|---|---|---|---|
| Cameron | Oncor | Yes, mostly | 1.46 | 14 mi away | 2,817 homes |
| Caldwell | — | No (city-owned utility) | n/a | 20 mi away | 0 homes |
| Taylor | Oncor | Yes, mostly | 1.42 | 26 mi away | 9,352 homes |
Business electricity in Rockdale
Rockdale business meters: 734 (4.0 homes per business meter); large non-residential meters in Rockdale’s main ZIP codes: 6 (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 Rockdale?
ZIP first, then your address; read each plan’s Electricity Facts Label before choosing.
Common questions about electricity in Rockdale
Can I choose my electricity provider in Rockdale?
Most Rockdale homes can. ERCOT's October 5, 2026 extract has 2,912 Rockdale-addressed homes on Oncor's competitive system, compared with 2,191 households in the Census survey. Addresses in 76567 (split) need an exact-address check before you shop.
Where do most Rockdale electricity customers live?
That is 76567, home to 2,910 of the competitive meters with a Rockdale address. ZIP-wide: 2,918 ERCOT meters, about 3,717 Census households, 0.79 per household.
How much is electricity in Rockdale 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 Rockdale. How do I set up electricity?
11.6% of 76567 residents moved within a year (ACS), and 7 meters in 76567 turned from vacant to active Oct. 7-18, 2026. Check that your Rockdale address is on Oncor's wires, then choose a plan and start date.
Why are there more electric meters than households in Rockdale?
2,912 Rockdale-addressed meters against 2,191 city households is 1.33 per household: the Rockdale 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.
Who restores power in Rockdale after an outage?
Oncor, at oncor.com/outages: it carries power to all 2,912 Rockdale-addressed competitive homes, whatever retail provider bills them.
Where to next?
Up: Oncor area · Milam County
Nearest town pages: Taylor · Elgin · Hutto · Jarrell · Pflugerville · Temple · Manor · Belton
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)
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