# Denison, 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 14,565 active residential meters with a Denison address, all on Oncor's wires (October 5, 2026). 1 of Denison's ZIP codes is split, so most addresses can shop, but yours needs a check.

## Moving to Denison

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

- **Water and utility billing:** utility billing (start, transfer or stop water service), 903-465-2720.
- **Natural gas:** Atmos Energy: customer service, 888-286-6700.
- **Public schools:** Denison ISD, Pottsboro ISD.
- **Driver license:** Texas DPS Driver License Office: Sherman, 512-424-2600.

## Who delivers electricity in Denison?
ERCOT counts 14,565 active residential meters with a Denison address, all on Oncor's wires (October 5, 2026).

## Can every address in Denison choose?
2,644 of 14,559 Denison-addressed competitive homes (18%) are in split ZIP codes (75021), where a neighbor may have a different utility.

## What is different about Denison?
- The Census Bureau's July 1, 2025 estimate for Denison is 26,822 people, up 9.6% on the 2020 estimates base of 24,476. The largest one-year change was +1,214 people, from July 2021 to July 2022. (Source: https://www2.census.gov/programs-surveys/popest/datasets/2020-2025/cities/totals/sub-est2025_48.csv)
- The Denison mailing area is bigger than the city: ERCOT lists 14,565 competitive homes under the Denison postal city, 1.4 for each of the city's 10,386 Census 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/)
- Of the 3,564,530 homes Oncor serves on the competitive market, 0.4% have a Denison mailing address. (Source: https://www.ercot.com/misapp/GetReports.do?reportTypeId=203)
- From Oct. 7 to Oct. 18, 2026, 37 residential meters in Denison's main ZIP codes went from vacant to active in ERCOT's daily files, which usually means a move-in. (Source: https://www.ercot.com/misapp/GetReports.do?reportTypeId=203)
- De-energized homes, usually empty or between tenants, number 1,548 in Denison's main ZIP codes, 7.2% of all 21,579 residential meters there. (Source: https://www.ercot.com/misapp/GetReports.do?reportTypeId=203)
- ZIP 75020 holds 11,802 of the 14,559 competitive homes with a Denison address (81%); across the whole ZIP there are 1.17 competitive meters per Census 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 competitive homes on its postal city, Denison is number 2 of the 18 cities and towns touching Grayson County, just behind Sherman (22,105). (Source: https://www.ercot.com/misapp/GetReports.do?reportTypeId=203)
- 41.3% of households in 75020 rent (ACS 2020-2024), the most among Denison's main ZIP codes, so a lot of Denison electricity accounts open and close with each lease. (Source: https://www2.census.gov/programs-surveys/acs/summary_file/2024/table-based-SF/data/5YRData/)
- Median household income across Denison's main ZIP codes runs from $71,605 in 75020 to $83,067 in 75021 (ACS 2020-2024); 30.7% of 75021 households and 27.6% of 75020 households report $250+ monthly electric bills. (Source: https://www2.census.gov/programs-surveys/acs/summary_file/2024/table-based-SF/data/5YRData/)
- Denison's land splits across 2 main ZIP codes, led by 75020 (90%) and 75021 (10%), per the Census 2020 ZCTA-to-place relationship file. (Source: https://www2.census.gov/geo/docs/maps-data/data/rel2020/zcta520/)

## By the numbers
- Population (July 1, 2025 estimate): 26,822
- Population (2020 estimates base): 24,476
- Occupied households (ACS 2020-2024): 10,386
- Active residential meters with a Denison address: 14,565
- Active business meters with a Denison address: 3,177
- Residential meters per Census household: 1.4
- Delivery utilities (homes): Oncor 14,565
- Counties: Grayson
- ZIP codes touching Denison: 3
- 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 |
|---|---|---|---|---|---|---|
| 75020 | Denison 100% | 42% | 11,806 | 10,085 | 1.17 | Near-full coverage.  |
| 75076 | Pottsboro 98%, Denison 2% | 0% | 5,560 | 3,270 | 1.7 | Near-full coverage. Mostly outside Denison city limits. |
| 75021 | Denison 99% | 5% | 2,665 | 3,379 | 0.79 | Split. Most homes, not all. Mostly outside Denison city limits. |

## Business electricity in Denison
3,177 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 Denison residents pick their own electric company?** Yes, where Oncor's wires reach the house, which in Denison is most of the city: 14,565 homes with a Denison mailing address were on the competitive market on October 5, 2026, 1.4 for each Census household. Split ZIP codes for Denison: 75021; on those, check the exact address.
**Which Denison ZIP code has the most homes on the competitive market?** 75020, with 11,806 competitive homes in ERCOT's data (11,802 addressed to Denison) against roughly 10,085 Census households, a 1.17 ratio. Coverage is thinnest in 75021, at 0.79.
**How many Denison households have a $250 electric bill?** Bills vary across Denison. 42.4% of households in 75076 told the Census survey (ACS 2020-2024) they pay $250 or more a month for electricity, compared with 27.6% in 75020. Bigger, older or all-electric homes push that share up, so compare plans at your own usage.
**I'm moving to Denison. How do I set up electricity?** 16.9% of 75020 residents moved within a year (ACS), and 22 75020 meters turned from vacant to active Oct. 7-18, 2026. Check that your Denison address is on Oncor's wires, then choose a plan and start date.
**Why are there more electric meters than households in Denison?** 14,565 Denison-addressed meters against 10,386 city households is 1.4 per household: the Denison 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 do I report a Denison power outage?** Oncor, at oncor.com/outages: it carries power to all 14,565 Denison-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
- 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/
- 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 ACS 2020-2024 5-year, table B25003: https://www2.census.gov/programs-surveys/acs/summary_file/2024/table-based-SF/data/5YRData/
- Census 2020 ZCTA-to-place relationship file: https://www2.census.gov/geo/docs/maps-data/data/rel2020/zcta520/

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