Union County, Ohio: Power, Data Centers and the Local Economy
Home to Paris Township, Marysville and Jerome Township
Union County supplies the labor the power build-out runs on. Electrical contractors employ 769, up 380.6% since 2019 against up 37.0% statewide, at an average $98,908 a year. Construction employs 2,489, up 130.7% since 2019. The SAVRN Data Center Map lists 7 data centers in Union County, 4% of Ohio's total. Union County is home to Paris Township, Marysville, Jerome Township and part of Dublin (4,265 of its 49,094 residents). 50 MW of new generation is planned here across 1 unit, led by Samsung C&T Renewables, LLC (battery storage).
Cities and towns in Union County
Union County is home to Paris Township, Marysville, Jerome Township and part of Dublin (4,265 of its 49,094 residents).
- Dublin also extends into Franklin County, Delaware County.
- Plain City also extends into Madison County.
Unincorporated communities (governed by the county): New California, Raymond.
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 Union County
1st = the most. Ranks cover counties with a value on record.
| Measure | Then | Now | Change | Rank in Ohio |
|---|---|---|---|---|
| Population (2020 → 2025) | 63,069 | 73,446 | ▲ 16.5% | 34th of 88 by size |
| Total jobs (2019 → 2025) | 33,532 | 36,813 | ▲ 9.8% | 9th of 88 by growth |
| Average annual pay (2019 → 2025) | $60,036 | $75,342 | ▲ 25.5% | — |
| Construction jobs (2019 → 2025) | 1,079 | 2,489 | ▲ 130.7% | 1st of 51 by growth |
| Electrical contractor jobs (2019 → 2025) | 160 | 769 | ▲ 380.6% | — |
| Unemployment rate (2019 → August 2026) | 3.0% | 2.9% | ▼ 0.1pts | — |
| Generating capacity added since 2019 | — | 565 MW | — | |
| Generating capacity retired since 2019 | — | 0 MW | — | |
| Planned generation (Aug 2026) | — | 50 MW | 9% of today's fleet | 17th of 22 by size |
Next door, Franklin County has 56 data centers and 400 MW of planned generation. 565 MW of that came online in 2019 or later, mostly solar. Employers here counted 36,813 jobs in 2025, up 9.8% from 2019 (the 9th fastest growth of 88 Ohio counties). 73,446 people live here, up 16.5% since 2020. Its power plants have 565 MW of capacity, 100% of it solar. Ohio Power Co is the largest utility serving Union County, one of 7 with territory here. Its residential customers paid an average 19.33¢/kWh in 2024, above the 15.40¢ median for Ohio utilities. Unemployment was 2.9% in August 2026, against 3.0% in 2019.
Who powers Union County
Net change in operating capacity since 2019: +565 MW. Colors follow the fuel legend above.
Utilities with service territory in Union County
| Utility | Ownership | Service | Residential customers (systemwide) | Residential price, 2024 | Commercial share of sales |
|---|---|---|---|---|---|
| Ohio Power Co | Investor Owned | Bundled | 1,339,232 | 19.33¢ | 22% |
| Ohio Edison Co | Investor Owned | Bundled | 957,780 | 16.18¢ | 18% |
| Dayton Power & Light Co | Investor Owned | Bundled | 478,741 | 15.32¢ | 20% |
| Consolidated Cooperative | Cooperative | Bundled | 16,897 | 16.11¢ | 24% |
| Pioneer Rural Elec Coop, Inc - (OH) | Cooperative | Bundled | 16,310 | 16.18¢ | 6% |
| Union Rural Electric Coop, Inc | Cooperative | Bundled | 11,812 | 15.67¢ | 17% |
| Mid-Ohio Energy 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 2
| Technology | Capacity | Share |
|---|---|---|
| Solar | 565 MW | 100% |
| Largest plants | Owner | Technology | MW | Since |
|---|---|---|---|---|
| AEUG Union Solar, LLC | Acciona Energy USA Global, LLC | Solar | 325 MW | 2024 |
| Cadence Solar Energy Center | Cadence Solar Energy LLC | Solar | 240 MW | 2026 |
Planned generation 1
| Plant | Technology | MW | Status | Year | Owner |
|---|---|---|---|---|---|
| Richwood Solar and Storage | Batteries | 50 MW | Planned, approvals not started | 2028 | Samsung C&T Renewables, LLC |
The Union County labor market
| Industry (2025) | Jobs | Average pay | Concentration vs U.S. |
|---|---|---|---|
| All industries | 36,813 | $75,342 | 1.00 |
| Construction | 2,489 | $94,111 | 1.28 |
| Electrical contractors | 769 | $98,908 | 2.90 |
| Data processing and hosting | 5 | $125,328 | 0.04 |
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 Union County
7 data centers in Union County are on the SAVRN Data Center Map.
Union County and its neighbors
Of the 7 counties that border Union County, Franklin 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 |
|---|---|---|---|---|---|---|
| Union County | 73,446 | ▲ 9.8% | 565 MW | 50 MW | 7 | — |
| Champaign County | 38,820 | ▲ 4.5% | 144 MW | — | — | 1 |
| Delaware County | 242,032 | ▲ 11.4% | 1 MW | — | 4 | — |
| Franklin County | 1,361,536 | ▲ 3.4% | 15 MW | 400 MW | 56 | 1 |
| Hardin County | 30,072 | ▼ 7.0% | 619 MW | — | — | — |
| Logan County | 46,302 | ▲ 1.5% | 253 MW | — | — | — |
| Madison County | 46,985 | ▲ 34.9% | 957 MW | 155 MW | — | — |
| Marion County | 65,115 | ▼ 5.9% | 114 MW | — | — | — |
More of Ohio
Union County, answered from the record
Who provides electricity in Union County, Ohio?
7 utilities have service territory in Union County in the EIA-861 2024 report: Ohio Power Co, Ohio Edison Co, Dayton Power & Light Co, Consolidated Cooperative. The largest, Ohio Power Co, charged residential customers 19.33¢/kWh on average in 2024.
What county is Paris Township, OH in?
Paris Township is in Union County, Ohio. About 32,021 people live there (2025 Census estimate).
What county is Marysville, OH in?
Marysville is in Union County, Ohio. About 30,190 people live there (2025 Census estimate).
What county is Jerome Township, OH in?
Jerome Township is in Union County, Ohio. About 11,237 people live there (2025 Census estimate).
What power plants are in Union County?
2 operating plants with 565 MW of capacity. The largest is AEUG Union Solar, LLC (325 MW, solar).
How much new power is planned in Union County?
50 MW across 1 units in the August 2026 EIA-860M inventory, 0 MW of it under construction or built. The largest owner is Samsung C&T Renewables, LLC.
Are there data centers in Union County?
Yes. The SAVRN Data Center Map lists 7 data centers in Union County.
Is Union County adding jobs?
Employers counted 36,813 jobs in 2025 against 33,532 in 2019 (+9.8%, BLS QCEW). Construction went from 1,079 to 2,489.
Does Union County have a data center moratorium?
No county-level measure is on record for Union County. Ohio has 105 local measures statewide, listed on the state page.