Electric companies in Williamson County, Texas
Williamson County, TX ranks 1 of 254 Texas counties for the newest homes (median year built 2005). Williamson County in Texas has 643,889 residents and 6 utilities listed by EIA. Oncor Electric Delivery Company LLC delivers power to 3,477,215 home accounts in Texas at 5.19 cents per kWh for delivery alone, and you choose only the supplier.
Households in Williamson County can pick a supplier. How to compare.
Williamson County on the map
Williamson County darker: more storm events
Electric utilities in Williamson County
| Utility listed for Williamson County, TX | Type | Home accounts in Texas |
|---|---|---|
| Oncor Electric Delivery Company LLC in Williamson County, TX | Investor Owned | 3,477,215 |
| Bluebonnet Electric Coop, Inc in Williamson County, TX | Cooperative | 113,890 |
| Pedernales Electric Coop, Inc in Williamson County, TX | Cooperative | 405,587 |
| Austin Energy in Williamson County, TX | Municipal | 507,291 |
| City of Georgetown in Williamson County, TX | Municipal | 29,904 |
| Bartlett Electric Coop, Inc in Williamson County, TX | Cooperative | 11,527 |
Oncor Electric Delivery Company LLC delivers power here and bills delivery only, so no plan price exists; you choose only the supplier. Which listed company serves your street depends on the address.
Housing and heating in Williamson County
Williamson County, TX: 24,396 of 251,600 homes were built before 1980 and 156,140 in 2000 or later. Williamson County, TX has 183,198 detached houses, 46,520 homes in 5+ unit buildings, 5,605 mobile homes, and 79,579 of 241,754 households rent.
Age of homes in Williamson County, TX
% of homes by decade built, Williamson County, TX
- 1pre-40
- 040s
- 150s
- 160s
- 670s
- 1280s
- 1690s
- 2600s
- 3010s
- 620+
Heating fuel in Williamson County, TX
| Williamson County, TX | Value | State median | Gap | Rank |
|---|---|---|---|---|
| Williamson County, TX, median year built | 2005 | 1981 | +24 years | 1 of 254 |
| Williamson County, TX, built before 1980 | 9.7% | 48.9% | -39.2 points | 253 of 254 |
| Williamson County, TX, built 2000 or later | 62.1% | 23.8% | +38.2 points | 3 of 254 |
| Williamson County, TX, detached houses | 72.8% | 73.4% | -0.6 points | 135 of 254 |
| Williamson County, TX, apartments in 5+ unit buildings | 18.5% | 3.7% | +14.8 points | 14 of 254 |
| Williamson County, TX, mobile homes | 2.2% | 14.1% | -11.8 points | 251 of 254 |
| Williamson County, TX, renter households | 32.9% | 25.5% | +7.4 points | 59 of 254 |
| Williamson County, TX, median home value | $414,600 | $158,050 | +$256,550 | 5 of 250 |
| Williamson County, TX, median gross rent a month | $1,720 | $928 | +$792 | 4 of 246 |
| Williamson County, TX, people per household | 2.65 | 2.59 | +0.06 | 100 of 254 |
ZIP codes in Williamson County
- 76511
- 76527
- 76530
- 76537
- 76573
- 76574
- 76578
- 78613
- 78615
- 78626
- 78628
- 78633
- 78634
- 78641
- 78642
- 78664
- 78665
- 78674
- 78681
- 78717
- 78728
- 78729
- 78750
Facts about Williamson County
- Residents of Williamson County, TX, ACS 2023
- 643,88912 of 254 Texas counties
- Households in Williamson County, TX
- 241,7542.66 people each
- Owner-occupied homes in Williamson County, TX
- 67.1%162,175 owner and 79,579 renter households
- Median household income in Williamson County, TX
- $108,3095 of 253 Texas counties
- Housing units in Williamson County, TX
- 251,6009,846 vacant or seasonal, 3.9% of the units
- Homes heated by electricity in Williamson County, TX
- 49.6%119,969 homes, 193 of 254 Texas counties
- Utilities listed for Williamson County, TX
- 65 with a home price: Bluebonnet Electric Coop, Inc, Pedernales Electric Coop, Inc, Austin Energy
- ZIP areas touching Williamson County, TX
- 2376511 to 78750
- Outage-linked storm events in Williamson County, TX
- 95NWS storm events, 2015 to 2025
- Homes built before 1980 in Williamson County, TX
- 9.7%median year built 2005
- Flood claims in Williamson County, TX
- 142NFIP 2015 to 2025, $6.6M paid
- Home energy burden in Williamson County, TX
- 1.6%$1,531 a year on electricity (DOE LEAD)
Cost of living with electricity in Williamson County
Williamson County, TX: electricity $1,531 a year per home (DOE LEAD), all home energy $1,986, 1.6% of $123,625 income. 229,906 households in Williamson County, TX spend about $352.0 million a year on electricity and $456.6 million on all home energy. Lower-income homes in Williamson County, TX ($21,272 a year) spend 7.5% of income, 4.6 times the all-home figure.
Energy burden in Williamson County, TX
| Williamson County, TX | Homes | Income | Power | Gas | Other | Burden |
|---|---|---|---|---|---|---|
| Williamson County, TX, all households | 229,906 | $123,625 | $1,531 | $448 | $7 | 1.6% |
| Williamson County, TX, lower income | 30,198 | $21,272 | $1,274 | $310 | $6 | 7.5% |
| Williamson County, TX, owners | 155,568 | $145,764 | $1,707 | $568 | $9 | 1.6% |
| Williamson County, TX, renters | 74,338 | $77,292 | $1,163 | $198 | $3 | 1.8% |
Outage risk in Williamson County
Williamson County, TX, NWS storm events 2015 to 2025: 95 in all, 14.8 per 100,000 residents of 643,889, rank 95 of 254 Texas counties. Property damage in Williamson County, TX: $25.9M, with 2 direct injuries or deaths.
Events by year in Williamson County, TX
events a year, Williamson County, TX
- 12'15
- 3'16
- 15'17
- 11'18
- 10'19
- 6'20
- 7'21
- 17'22
- 10'23
- 1'24
- 3'25
Events by type
| Williamson County, TX | FEMA | Score | Rank | Events | Peak | Damage |
|---|---|---|---|---|---|---|
| Williamson County, TX, thunderstorm and high wind | Relatively Moderate | 55.9 | 105 of 254 | 60 | 2017 (11) | $268K |
| Williamson County, TX, tornado | Relatively High | 93.9 | 30 of 254 | 16 | 2015 (4) | $806K |
| Williamson County, TX, hurricane and tropical storm | Relatively Low | 69.0 | 79 of 250 | 0 | none | $0 |
| Williamson County, TX, ice storm | Relatively Moderate | 72.5 | 67 of 254 | 0 | none | $0 |
| Williamson County, TX, winter storm and heavy snow | Very High | 96.8 | 8 of 254 | 11 | 2021 (4) | $22.9M |
| Williamson County, TX, heat wave | Relatively Moderate | 91.0 | 34 of 254 | 5 | 2023 (3) | $0 |
Flood claims and flood insurance in Williamson County
Williamson County, TX: 142 NFIP flood claims in 2015 to 2025, $6.6M paid, median paid claim $33,321.
1,949 of 177,153 residential structures in Williamson County, TX carry an NFIP contract. 2,044 NFIP policies of any type were in force in Williamson County, TX on 8 Sep 2026. Williamson County, TX lists 75 repetitive-loss properties, 13 of them severe repetitive loss.
Williamson County, TX: claims history, not an outage count.
Flood claims by year in Williamson County, TX
flood claims a year, Williamson County, TX
- 67'15
- 11'16
- <5'17
- 8'18
- <5'19
- <5'20
- <5'21
- <5'22
- <5'23
- 0'24
- 43'25
| Williamson County, TX | Value | Median county | Rank |
|---|---|---|---|
| Williamson County, TX, claims 2015-2025 | 142 | — | 40 of 140 |
| Williamson County, TX, paid 2015-2025 | $6.6M | — | 33 of 140 |
| Williamson County, TX, median paid claim | $33,321 | — | — |
| Williamson County, TX, claims per 1,000 homes | 0.8 | 2.9 | 119 of 140 |
| Williamson County, TX, homes with flood insurance | 1.1% | 0.7% | 83 of 222 |
| Williamson County, TX, policies in force | 2,044 | — | — |
| Williamson County, TX, repetitive-loss properties | 75 | — | — |
Williamson County, TX: OpenFEMA NFIP, claims as of 8 Sep 2026, insured share as of 3 Aug 2026; counts under 5 are hidden.
Williamson County: flood claims by state, flood hub.
Analyst note on Williamson County
Williamson County, TX touches 23 ZIP areas, 76511 to 78750, about 27,995 residents each. Household income in Williamson County, TX is $108,309; 162,175 of its 241,754 households own. Williamson County, TX counts 643,889 residents in 241,754 households.
119,969 of the 241,754 homes in Williamson County, TX heat with electricity. Williamson County, TX has 251,600 housing units, 9,846 (3.9%) vacant or seasonal, and 79,579 rented homes. Williamson County, TX logged 95 storm events for its 643,889 residents.
The median home in Williamson County, TX dates from 2005. Homes in Williamson County, TX pay $1,531 a year for electricity.
Bill and heat pump calculator, Williamson County
Compare Williamson County with its neighbours
- Travis County sits 10 miles south of Williamson County, TX with 1,307,625 residents, 139 storm events, median home built 1997, energy burden 1.3%, income $97,169.
- Bell County sits 35 miles north of Williamson County, TX with 379,811 residents, 117 storm events, median home built 1995, energy burden 2.7%, income $66,051.
- Bastrop County sits 34 miles southeast of Williamson County, TX with 102,370 residents, 53 storm events, median home built 1996, energy burden 2.3%, income $82,730.
- Hays County sits 41 miles south of Williamson County, TX with 256,429 residents, 65 storm events, median home built 2005, energy burden 1.6%, income $85,827.
- Burnet County sits 37 miles northwest of Williamson County, TX with 51,064 residents, 60 storm events, median home built 1995, energy burden 2.4%, income $77,158.
Cities in Williamson County
- Round Rock electricity rates124,288 residents
- Georgetown electricity rates78,803 residents
- Cedar Park electricity rates77,474 residents
- Leander electricity rates67,880 residents
- Hutto electricity rates32,188 residents
Texas: home prices since 2001, planned plants.
Questions on Williamson County
Williamson County, TX: what do homes pay for electricity?
No single price in Williamson County, TX: 6 utilities deliver power and homes pick a plan. Texas average 14.94 cents per kWh, $164 a month at 1,096 kWh.
Williamson County, TX: how many homes heat with electricity?
Williamson County, TX: 119,969 of 241,754 occupied homes, 49.6%, rank 193 of 254.
Williamson County, TX: median household income?
$108,309 in Williamson County, TX, rank 5 of 253; 643,889 residents, 241,754 households.
Williamson County, TX: outage-linked storms since 2015?
Williamson County, TX: 95 NWS events, peak year 2022.
Williamson County, TX: flood insurance claims since 2015?
Williamson County, TX: 142 NFIP flood claims, $6.6M paid, 0.8 per 1,000 homes, 1.1% of homes insured.
How old are the homes in Williamson County, TX?
Williamson County, TX: median home built 2005; 9.7% predate 1980, 72.8% detached, 18.5% in 5+ unit buildings.
Williamson County, TX: share of income for energy?
Williamson County, TX homes spend $1,531 a year on electricity, $1,986 on all energy: 1.6% of $123,625; 7.5% for lower incomes.