# Elgin, Texas electricity: Oncor wires, 1 split ZIP code to check

_Updated October 19, 2026. Data: ERCOT Oct 5, 2026; Power to Choose Oct 19, 2026, 7:59 AM CT._

**In short:** ERCOT counts 7,865 active residential meters with an Elgin address, all on Oncor's wires (October 5, 2026). 1 of Elgin's ZIP codes is split, so most addresses can shop, but yours needs a check.

## Moving to Elgin

Local numbers for setting up a home in Elgin, each checked on the official source. More contacts: https://powerhopper.energy/texas-electricity/elgin/move-in-information

- **Water and utility billing:** utility billing (start, transfer or stop water service), 512-229-3220.
- **Natural gas:** CenterPoint Energy: gas leak emergency (24/7), 888-876-5786.
- **Public schools:** Elgin ISD.
- **Driver license:** Texas DPS Driver License Office: Taylor, 512-424-2600.

## Who delivers electricity in Elgin?
ERCOT counts 7,865 active residential meters with an Elgin address, all on Oncor's wires (October 5, 2026).

## Can every address in Elgin choose?
Split ZIP codes holding Elgin homes: 78621. They carry 7,798 of the 7,833 competitive homes with an Elgin address (100%); on those streets a neighbor's utility can differ from yours.

## What is different about Elgin?
- Population: 9,700 (2020 base) to 13,327 (July 2025), +37.4%, per Census Vintage 2025 estimates. The largest one-year change was +987 people, from July 2022 to July 2023. July 1 estimates in between: 10,457 (2021), 11,368 (2022), 12,355 (2023), 12,542 (2024). (Source: https://www2.census.gov/programs-surveys/popest/datasets/2020-2025/cities/totals/sub-est2025_48.csv)
- Elgin covers 7.3 square miles of land (Census 2025 Gazetteer). That works out to about 1,837 residents and 603 occupied households per square mile of land, with roughly 3.0 residents for every Elgin household. (Source: https://www.census.gov/geographies/reference-files/time-series/geo/gazetteer-files.html, https://www2.census.gov/programs-surveys/popest/datasets/2020-2025/cities/totals/sub-est2025_48.csv, https://www2.census.gov/programs-surveys/acs/summary_file/2024/table-based-SF/data/5YRData/)
- Mailing addresses stretch past city limits here. 7,865 competitive residential meters use Elgin as their postal city, while the city itself has 4,375 Census households, a ratio of 1.8. Because Elgin has grown 37 percent since the 2020 base, the ACS 2020-2024 household figure likely runs behind today's count. (Source: https://www.ercot.com/misapp/GetReports.do?reportTypeId=203, https://www2.census.gov/programs-surveys/acs/summary_file/2024/table-based-SF/data/5YRData/)
- Oncor share: 0.2% of its 3,564,530 competitive residential meters carry an Elgin address. (Source: https://www.ercot.com/misapp/GetReports.do?reportTypeId=203)
- ERCOT's daily extracts logged 15 newly created home meters in the ZIP codes most Elgin homes use between Oct. 7 and Oct. 18, 2026; the busiest was 78621 with 15. Another 160 went from vacant to active over the same days. (Source: https://www.ercot.com/misapp/GetReports.do?reportTypeId=203)
- On October 5, 2026, ERCOT showed 1,406 home meters switched off (de-energized) in the ZIP codes most Elgin homes use, against 7,806 switched on; that 15.3 percent is mostly vacant houses and apartments between occupants. (Source: https://www.ercot.com/misapp/GetReports.do?reportTypeId=203)
- One ZIP code, 78621, holds almost every Elgin-addressed competitive home (7,798). Taken whole, 78621 has 0.77 competitive meters per Census household: 7,806 meters, 10,175 households. (Source: https://www.ercot.com/misapp/GetReports.do?reportTypeId=203, https://www2.census.gov/programs-surveys/acs/summary_file/2024/table-based-SF/data/5YRData/)
- By the Census Bureau's 2025 estimates, Elgin is the number 3 city or town by population among the 5 that reach into Bastrop County, one place ahead of Smithville (4,367 residents). (Source: https://www2.census.gov/programs-surveys/popest/datasets/2020-2025/cities/totals/sub-est2025_48.csv)
- Electric bills over $250 a month: 34.8 percent of households in 78621, Elgin's main ZIP code, per the ACS 2020-2024; the same survey puts median household income there at $98,534 and the renter share at 18.9 percent. (Source: https://www2.census.gov/programs-surveys/acs/summary_file/2024/table-based-SF/data/5YRData/)
- Neighbors differ: Round Rock, about 20 miles away, has 72,407 competitive homes on its postal city, while Manor manages 0.23 per household. (Source: https://www.ercot.com/misapp/GetReports.do?reportTypeId=203, https://www2.census.gov/programs-surveys/acs/summary_file/2024/table-based-SF/data/5YRData/)

## By the numbers
- Population (July 1, 2025 estimate): 13,327
- Population (2020 estimates base): 9,700
- Occupied households (ACS 2020-2024): 4,375
- Active residential meters with an Elgin address: 7,865
- Active business meters with an Elgin address: 1,235
- Residential meters per Census household: 1.8
- Delivery utilities (homes): Oncor 7,865
- Counties: Bastrop, Travis
- ZIP codes touching Elgin: 2
- Split ZIP codes (flagged below): 1

## Plan prices (median ¢/kWh at 500 / 1,000 / 2,000 kWh)
- Oncor: 14.1 / 13.4 / 13.2; delivery 6.8673¢/kWh + $4.06/mo

## ZIP codes
**Not every address in these ZIP codes has retail choice; check your exact address.**

| ZIP | Postal cities | Land in city | Competitive homes | Households | Ratio | Notes |
|---|---|---|---|---|---|---|
| 78621 | Elgin 100% | 4% | 7,806 | 10,175 | 0.77 | Split. Most homes, not all. 15 new residential meters Oct 7-18, 2026. Mostly outside Elgin city limits. |
| 78615 | Coupland 69%, Taylor 24%, Elgin 6% | 0% | 573 | 549 | 1.04 | Near-full coverage. Mostly outside Elgin city limits. |

## Business electricity in Elgin
1,235 active business meters. Power Hopper compares offers from retail electric providers and direct suppliers; for high-consumption businesses we can run a competitive bid. No savings or bidder count is promised. Businesses in Texas retail-choice areas can request a rate review online.

## Questions
**Can Elgin residents pick their own electric company?** Yes, where Oncor's wires reach the house, which in Elgin is most of the city: 7,865 homes with an Elgin mailing address were on the competitive market on October 5, 2026, 1.8 for each Census household. Addresses in 78621 (split) need an exact-address check before you shop.
**What is the biggest Elgin ZIP code for electricity customers?** 78621. It holds 7,798 Elgin-addressed competitive homes; counting every address in the ZIP, ERCOT has 7,806 meters for roughly 10,175 households, a 0.77 ratio.
**What is the average electricity rate in Elgin?** 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.
**How do I start electric service at a new Elgin address?** 9.4% of 78621 residents moved within a year (ACS), and 160 meters in 78621 turned from vacant to active Oct. 7-18, 2026. Check that your Elgin address is on Oncor's wires, then choose a plan and start date.
**Why are there more electric meters than households in Elgin?** 7,865 Elgin-addressed meters against 4,375 city households is 1.8 per household: the Elgin 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 do I call in Elgin when the power goes out?** Oncor, at oncor.com/outages: it carries power to all 7,865 Elgin-addressed competitive homes, whatever retail provider bills them.

## Sources
- ERCOT TDSP ESIID Extract (report 203): full extract as of Oct 5, 2026; daily files Oct 7-18, 2026: https://www.ercot.com/misapp/GetReports.do?reportTypeId=203
- Census ACS 2020-2024 5-year estimates (B25003 households, B01003 population): https://www2.census.gov/programs-surveys/acs/summary_file/2024/table-based-SF/data/5YRData/
- Census Vintage 2025 city and town population estimates: https://www2.census.gov/programs-surveys/popest/datasets/2020-2025/cities/totals/sub-est2025_48.csv
- Census 2020 ZCTA-to-place and ZCTA-to-county relationship files: https://www2.census.gov/geo/docs/maps-data/data/rel2020/zcta520/
- EIA-861 (2024) utility service territories by county: https://www.eia.gov/electricity/data/eia861/
- PUCT Power to Choose residential offer export, Oct 19, 2026, 7:59 AM CT: https://www.powertochoose.org/en-us/Plan/ExportToCsv
- PUCT: Choosing an Electric Plan: https://www.puc.texas.gov/consumer-help/electricity/electric-plan/
- PUCT broker directory (BR260201): https://www.puc.texas.gov/industry/electric/directories/brk/alpha_brk/
- Oncor Electric Delivery: https://www.oncor.com/
- Oncor delivery tariff (effective October 4, 2026): https://interchange.puc.texas.gov/Documents/59249_105_1676040.PDF
- Census Bureau Vintage 2025 city and town population estimates: https://www2.census.gov/programs-surveys/popest/datasets/2020-2025/cities/totals/sub-est2025_48.csv
- Census Bureau 2025 Gazetteer Files, Texas places (land and water area): https://www.census.gov/geographies/reference-files/time-series/geo/gazetteer-files.html
- Census Bureau Vintage 2025 city and town population estimates: https://www2.census.gov/programs-surveys/popest/datasets/2020-2025/cities/totals/sub-est2025_48.csv
- Census ACS 2020-2024 5-year, table B25003: https://www2.census.gov/programs-surveys/acs/summary_file/2024/table-based-SF/data/5YRData/
- ERCOT TDSP ESIID Extract (report 203), Oct 5, 2026: https://www.ercot.com/misapp/GetReports.do?reportTypeId=203
- Census ACS 2020-2024 5-year, table B25003: https://www2.census.gov/programs-surveys/acs/summary_file/2024/table-based-SF/data/5YRData/
- ERCOT TDSP ESIID Extract (report 203), Oct 5, 2026: https://www.ercot.com/misapp/GetReports.do?reportTypeId=203
- ERCOT daily TDSP ESIID Extract files, Oct 7-18, 2026, via Power Hopper's Oct 18 ZIP study: https://www.ercot.com/misapp/GetReports.do?reportTypeId=203
- ERCOT TDSP ESIID Extract (report 203), Oct 5, 2026: https://www.ercot.com/misapp/GetReports.do?reportTypeId=203
- ERCOT TDSP ESIID Extract (report 203), Oct 5, 2026: https://www.ercot.com/misapp/GetReports.do?reportTypeId=203
- Census ACS 2020-2024 5-year, table B25003: https://www2.census.gov/programs-surveys/acs/summary_file/2024/table-based-SF/data/5YRData/
- Census Bureau Vintage 2025 city and town population estimates: https://www2.census.gov/programs-surveys/popest/datasets/2020-2025/cities/totals/sub-est2025_48.csv
- Census ACS 2020-2024 5-year, table B25003: https://www2.census.gov/programs-surveys/acs/summary_file/2024/table-based-SF/data/5YRData/
- ERCOT TDSP ESIID Extract (report 203), Oct 5, 2026: https://www.ercot.com/misapp/GetReports.do?reportTypeId=203
- Census ACS 2020-2024 5-year, table B25003: https://www2.census.gov/programs-surveys/acs/summary_file/2024/table-based-SF/data/5YRData/

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