Mercer County, Ohio Electric Utilities & Business Choice
Who provides electricity in Mercer County?
The investor-owned utility in Mercer County is AES Ohio. Three electric cooperatives also serve rural parts of the county. Municipal electric systems operate in Celina and Mendon. Businesses on an investor-owned utility can choose a PUCO-certified generation supplier; co-op members and municipal-system customers generally cannot. Mercer County is in northwest Ohio, with its county seat in Celina and 42,528 residents (2020 Census).
| Provider | Type | Can businesses choose a supplier? |
|---|---|---|
| AES Ohio | Investor-owned distribution utility | Yes |
| Darke Rural Electric Cooperative | Electric cooperative | Generally no (member-owned) |
| Midwest Electric | Electric cooperative | Generally no (member-owned) |
| Pioneer Electric Cooperative | Electric cooperative | Generally no (member-owned) |
| Celina | Municipal electric system | Generally no |
| Mendon | Municipal electric system | Generally no |
Utility boundaries follow service-territory maps, not township or city lines, so two buildings a mile apart can have different providers. The utility name on each bill is the final word. What co-op and municipal customers can do instead of shopping is covered in municipal and co-op areas.
Default prices for the utilities in Mercer County
| Utility | Small-business default generation price | Period |
|---|---|---|
| AES Ohio | Varies by rate schedule (on your bill); residential reference 10.86¢ | June 2026 – May 2027 annual average |
AES Ohio sits in PJM, where the capacity price that feeds into generation costs is $329.17/MW-day for June 2026–May 2027 and $333.44 for 2027/28, versus $28.92 in 2024/25.
Buying for several sites in Mercer County
- One utility, one price structure. Every shoppable site in the county is on AES Ohio, which keeps portfolio pricing simple.
- Pull out co-op and municipal meters. They generally can't be enrolled with a retail supplier; sending them wastes suppliers' credit reviews and slows quotes.
- Check aggregation status. Accounts at 700,000 kWh a year or less may already be in a community aggregation program; note each account's current supplier and end date.
- Co-term contracts. Aligning end dates lets you re-bid the whole portfolio at once instead of renewing one site at a time.
Mercer County and its neighbors
Northwest Ohio splits between Toledo Edison around Toledo and the Maumee valley, AEP Ohio around Findlay, Lima and Fostoria, and Ohio Edison near Sandusky. Rural electric cooperatives and village-owned systems (Bryan, Napoleon, Bowling Green and others) are unusually common.
| Neighboring county | County seat | Investor-owned utilities |
|---|---|---|
| Auglaize County | Wapakoneta (21 mi from Celina) | AEP Ohio and AES Ohio |
| Van Wert County | Van Wert (22 mi from Celina) | AEP Ohio and AES Ohio |
| Shelby County | Sidney (28 mi from Celina) | AES Ohio |
| Allen County | Lima (29 mi from Celina) | AEP Ohio |
No city guide on this site is inside Mercer County; the closest ones to Celina are Van Wert (22 mi, AEP Ohio), Sidney (28 mi, AES Ohio), and Lima (29 mi, AEP Ohio).
FAQ: Mercer County electricity
What electric companies serve Mercer County, Ohio?
AES Ohio, Darke Rural Electric Cooperative, Midwest Electric, Pioneer Electric Cooperative, Celina, and Mendon.
Can businesses in Mercer County choose an electricity supplier?
Yes, if the account is on AES Ohio. Cooperative members and municipal-system customers generally cannot.
How do I know which utility serves my Mercer County building?
Look at the name printed on the bill's delivery section. If you're buying or leasing a new site, ask the landlord or seller for a recent bill before comparing costs.
Decision worksheet: service areas within Mercer County
Use a meter schedule rather than one county-wide assumption
Mercer County is in northwest Ohio and its county seat is Celina. A county portfolio should begin with each legal customer, utility name and service address. Investor-owned utility coverage, municipal systems and cooperative service do not stop neatly at the same administrative boundaries.
There is no separately maintained city guide in this county’s current city inventory. Use the utility named on the actual bill rather than substituting a nearby city’s information.
The existing county inventory identifies cooperative context including Darke Rural Electric Cooperative, Midwest Electric, Pioneer Electric Cooperative and municipal context including Celina, Mendon. This is not an exhaustive address-level determination; confirm service directly before enrolling a meter.
Assign responsibilities before a portfolio bid
Give one person ownership of the service-address list, another responsibility for expected operating changes, and a named signer responsibility for contract authority. These roles may be held by one person, but they should not be assumed from who receives the monthly invoice. Tenant, franchise and property-management arrangements deserve a separate authority check.
Keep non-shoppable accounts in the operating-cost review while excluding them from retail-supplier enrollment schedules. For eligible accounts, compare start dates, included supply components, additional fees and site-removal rights. A master agreement is a contractual structure, not a guarantee that every meter receives the same price or automatic savings.
Use the comparison tools without sending financial inputs to the website. The first inquiry needs only business, utility and the decision you want help with. For definitions, consult PUCO’s customer-choice guidance.