Dewey County, Oklahoma: Power, Data Centers and the Local Economy
Home to Fay
Dewey County is a power-producing county: the plants here serve load well beyond its borders. Dewey County is home to Seiling and Vici. 251 MW of new generation is planned here across 2 units, led by Mammoth Plains Energy Storage, LLC (battery storage), the 8th largest pipeline among Oklahoma's counties. Employers here counted 2,264 jobs in 2025, up 19.0% from 2019 (the 8th fastest growth of 77 Oklahoma counties). Its power plants have 881 MW of capacity, 100% of it wind. Oklahoma Gas & Electric Co is the largest utility serving Dewey County, one of 6 with territory here. Its residential customers paid an average 11.78¢/kWh in 2024, below the 12.53¢ median for Oklahoma utilities.
Cities and towns in Dewey County
Dewey County is home to Seiling and Vici.
Unincorporated communities (governed by the county): Fay.
Residents are 2025 Census estimates for the part of each city, town or township inside this county. Census publishes no annual estimate for unincorporated communities.
What changed in Dewey County
1st = the most. Ranks cover counties with a value on record.
| Measure | Then | Now | Change | Rank in Oklahoma |
|---|---|---|---|---|
| Population (2020 → 2025) | 4,476 | 4,207 | ▼ 6.0% | 71st of 77 by size |
| Total jobs (2019 → 2025) | 1,903 | 2,264 | ▲ 19.0% | 8th of 77 by growth |
| Average annual pay (2019 → 2025) | $51,970 | $76,999 | ▲ 48.2% | — |
| Construction jobs (2019 → 2025) | 80 | 80 | ● 0.0% | — |
| Unemployment rate (2019 → August 2026) | 2.5% | 2.1% | ▼ 0.4pts | — |
| Generating capacity added since 2019 | — | 0 MW | — | |
| Generating capacity retired since 2019 | — | 0 MW | — | |
| Planned generation (Aug 2026) | — | 251 MW | 29% of today's fleet | 8th of 12 by size |
Unemployment was 2.1% in August 2026, against 2.5% in 2019. 4,207 people live here, down 6.0% since 2020.
Who powers Dewey County
Utilities with service territory in Dewey County
| Utility | Ownership | Service | Residential customers (systemwide) | Residential price, 2024 | Commercial share of sales |
|---|---|---|---|---|---|
| Oklahoma Gas & Electric Co | Investor Owned | Bundled | 710,123 | 11.78¢ | 44% |
| Public Service Co of Oklahoma | Investor Owned | Bundled | 501,093 | 12.73¢ | 36% |
| CKenergy Electric Cooperative | Cooperative | Bundled | 22,555 | 12.82¢ | 41% |
| Cimarron Electric Coop | Cooperative | Bundled | 15,258 | 11.87¢ | 52% |
| Northwestern Electric Coop Inc - (OK) | Cooperative | Bundled | 9,620 | 15.28¢ | 32% |
| Northfork Electric Coop, Inc | — | — | — | — | — |
Customer counts, prices and sales shares cover each utility's whole system in the state, not only this county. Commercial sales include data centers.
Operating power plants 5
| Technology | Capacity | Share |
|---|---|---|
| Wind | 881 MW | 100% |
| Largest plants | Owner | Technology | MW | Since |
|---|---|---|---|---|
| Crossroads Wind Farm | Oklahoma Gas & Electric Co | Wind | 228 MW | 2012 |
| Mammoth Plains | Mammoth Plains Wind Project | Wind | 226 MW | 2014 |
| Seiling Wind I | NextEra Energy Seiling Wind | Wind | 199 MW | 2014 |
| Taloga Wind LLC | Taloga Wind LLC | Wind | 130 MW | 2011 |
| Seiling Wind II | NextEra Energy Seiling Wind | Wind | 99 MW | 2014 |
Planned generation 2
| Plant | Technology | MW | Status | Year | Owner |
|---|---|---|---|---|---|
| Mammoth Plains Energy Storage | Batteries | 150 MW | Planned, approvals not started | 2027 | Mammoth Plains Energy Storage, LLC |
| Mammoth Plains Energy Storage II | Batteries | 101 MW | Planned, approvals not started | 2029 | Mammoth Plains Energy Center, LLC |
The Dewey County labor market
| Industry (2025) | Jobs | Average pay | Concentration vs U.S. |
|---|---|---|---|
| All industries | 2,264 | $76,999 | 1.00 |
| Construction | 80 | $53,526 | 0.67 |
Concentration is the BLS location quotient: 1.0 means the industry holds the same share of local jobs as it does nationally. Industry rows count private employers; cells BLS suppresses are left out.
Data centers and local rules in Dewey County
No data center, local measure or delayed project is on record in Dewey County. Oklahoma has 15 local measures on record statewide.
Dewey County and its neighbors
Of the 6 counties that border Dewey County, Custer County carries the most build-out activity: data centers, planned generation and operating plants combined.
| County | Population | Jobs since 2019 | Operating MW | Planned MW | Data centers | Local measures |
|---|---|---|---|---|---|---|
| Dewey County | 4,207 | ▲ 19.0% | 881 MW | 251 MW | — | — |
| Blaine County | 8,515 | ▼ 8.8% | — | — | — | — |
| Custer County | 28,175 | ▼ 1.7% | 1,146 MW | — | — | — |
| Ellis County | 3,613 | ▼ 3.8% | 475 MW | — | — | — |
| Major County | 7,536 | ▼ 17.5% | 288 MW | — | — | — |
| Roger Mills County | 3,259 | ▼ 8.0% | 453 MW | — | — | — |
| Woodward County | 19,827 | ▼ 7.5% | 1,047 MW | — | — | — |
More of Oklahoma
Dewey County, answered from the record
Who provides electricity in Dewey County, Oklahoma?
6 utilities have service territory in Dewey County in the EIA-861 2024 report: Oklahoma Gas & Electric Co, Public Service Co of Oklahoma, CKenergy Electric Cooperative, Cimarron Electric Coop. The largest, Oklahoma Gas & Electric Co, charged residential customers 11.78¢/kWh on average in 2024.
What power plants are in Dewey County?
5 operating plants with 881 MW of capacity. The largest is Crossroads Wind Farm (228 MW, wind).
How much new power is planned in Dewey County?
251 MW across 2 units in the August 2026 EIA-860M inventory, 0 MW of it under construction or built. The largest owner is Mammoth Plains Energy Storage, LLC.
Are there data centers in Dewey County?
The SAVRN Data Center Map has no data center in Dewey County.
Is Dewey County adding jobs?
Employers counted 2,264 jobs in 2025 against 1,903 in 2019 (+19.0%, BLS QCEW). Construction went from 80 to 80.
Does Dewey County have a data center moratorium?
No county-level measure is on record for Dewey County. Oklahoma has 15 local measures statewide, listed on the state page.