Warren County, Ohio Electric Utilities & Business Choice
Market-reference note: Numerical default-price examples below retain their cited 2026 reference period. They are historical class-level context, not a current account quote. Confirm the applicable business rate, components and effective dates on your bill before comparing an offer. How to establish your benchmark.
Who provides electricity in Warren County?
Warren County is split among two investor-owned utilities: Duke Energy Ohio serves the largest share, with AES Ohio serving other areas. Municipal electric systems operate in Lebanon. Businesses on an investor-owned utility can choose a PUCO-certified generation supplier; co-op members and municipal-system customers generally cannot. Warren County is in southwest Ohio, with its county seat in Lebanon and 242,337 residents (2020 Census); its largest city is Mason.
| Provider | Type | Can businesses choose a supplier? |
|---|---|---|
| Duke Energy Ohio | Investor-owned distribution utility | Yes |
| AES Ohio | Investor-owned distribution utility | Yes |
| Lebanon | 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 Warren County
| Utility | Small-business default generation price | Period |
|---|---|---|
| Duke Energy Ohio | Historical class reference: 11.36¢/kWh, DM (first 2,800 kWh) rate | effective June 1, 2026 |
| AES Ohio | Varies by rate schedule (on your bill); residential reference 10.86¢ | June 2026 – May 2027 annual average |
All of these utilities sit 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 Warren County
- Split the bid by utility. Suppliers price Duke Energy Ohio and AES Ohio accounts separately, so a single county-wide price isn't realistic.
- 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.
Warren County and its neighbors
Southwest Ohio is split between Duke Energy Ohio (Greater Cincinnati) and AES Ohio (Dayton and the Miami Valley), with municipal systems in Hamilton, Piqua, Lebanon and several villages.
| Neighboring county | County seat | Investor-owned utilities |
|---|---|---|
| Butler County | Hamilton (16 mi from Lebanon) | Duke Energy Ohio and AES Ohio |
| Clinton County | Wilmington (20 mi from Lebanon) | AES Ohio and Duke Energy Ohio |
| Montgomery County | Dayton (22 mi from Lebanon) | AES Ohio and Duke Energy Ohio |
| Greene County | Xenia (22 mi from Lebanon) | AES Ohio and Ohio Edison |
City guides in Warren County
- Mason — Duke Energy Ohio
FAQ: Warren County electricity
What electric companies serve Warren County, Ohio?
Duke Energy Ohio, AES Ohio, and Lebanon.
Can businesses in Warren County choose an electricity supplier?
Yes, if the account is on Duke Energy Ohio or AES Ohio. Cooperative members and municipal-system customers generally cannot.
How do I know which utility serves my Warren 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 Warren County
Use a meter schedule rather than one county-wide assumption
Warren County is in southwest Ohio and its county seat is Lebanon. 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.
| Local guide | Starting utility context | Enrollment check |
|---|---|---|
| Mason | Duke Energy Ohio | Confirm the delivery utility at the actual meter |
The existing county inventory identifies cooperative context including no separately listed cooperative in this dataset and municipal context including Lebanon. 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.