Businesses in Ohio: 255,049 establishments, three big metros and a manufacturing core

This page is for anyone who needs to understand or work with businesses in Ohio: someone checking out a contractor or supplier, a job seeker comparing employers, an analyst, or a B2B seller deciding where in the state to start. It covers how many businesses there are and where, what they do, who employs the most people, the biggest headquarters, and how to find and approach the right ones.

How many businesses are in Ohio

The Census Bureau's County Business Patterns (CBP) counts business establishments with paid employees. For Ohio in 2023:

That's 209,584 establishments with 1 to 19 employees, 37,728 with 20 to 99 and 7,737 with 100 or more. Ohio's average of 19.9 employees per establishment, against Maryland's 17.3, reflects how many large plants, hospitals and distribution centers it has. CBP counts locations rather than companies, so a grocery chain with 200 Ohio stores counts 200 times; it excludes self-employed people and businesses without payroll, and it measures employment in the pay period including March 12.

Where Ohio's businesses are

The three counties at the top have 32.7% of Ohio's establishments and 37.5% of its employees. Franklin County has 796 fewer establishments than Cuyahoga but 13,844 more employees, reflecting the large insurance, banking and retail employers in Columbus.

What Ohio's businesses do

Average pay is our calculation: payroll divided by employees. Manufacturing has only 5.2% of Ohio's establishments but 13.6% of CBP employment, with an average of 52 employees per plant. Health care is the largest employer by sector, with 883,961 people. For the industry detail, see manufacturing companies in Ohio and trucking companies in Ohio.

The government sits on top of these figures. In the Bureau of Labor Statistics' Quarterly Census of Employment and Wages, Ohio averaged 5,534,587 covered jobs in 2025: 4,796,137 private (86.7%), 521,285 in local government, 135,064 in state government and 82,101 federal.

Checking an Ohio business

Before you hire an Ohio contractor or sign with a supplier, confirm the legal name and active status with the Secretary of State, check any license the work requires, and get a certificate of insurance. Some trades also need a local permit or registration, so ask the city or county where the work will be done.

Ohio's largest employers

Ohio's regional economic development groups publish their own lists. Two of the biggest regions:

REDI's list cites the Courier's 2024 to 2025 Book of Lists. The Columbus Region page doesn't date its figures. The two regions' biggest employers differ in character: Cincinnati's top eight includes three health systems and a children's hospital, while Columbus's includes two banks, an insurer, a carmaker and an online retailer, and the Columbus Region marks five of its eight (Nationwide, Cardinal Health, Huntington, AEP and Victoria's Secret) as headquartered there. For Greater Cincinnati in detail, see companies in Cincinnati.

The biggest companies headquartered in Ohio

These are the 15 largest SEC-registered public companies whose latest 10-K gives an Ohio principal executive office, by revenue in that filing:

Cardinal Health, Procter & Gamble, Parker-Hannifin and Cintas have filed 2026 annual reports. MPLX is a master limited partnership formed by Marathon Petroleum, which is also its main customer. Eaton, often listed as a Cleveland company, gives Dublin, Ireland as its principal executive office, so it isn't ranked.

Prospecting Ohio businesses

The size bands tell you who signs. Owners decide at the 209,584 establishments under 20 employees, office or plant managers between 20 and 99, and functional buyers (procurement, operations, HR, IT) at the 7,737 sites with 100 or more. At Ohio's mid-size manufacturers, the plant manager often holds the budget for anything that keeps lines running, while corporate headquarters set policy for safety, IT and benefits.

Illustrative example. The company, rates and results are fictional, to show the method.

Cuyahoga Lean (cuyahogalean.example) runs changeover-reduction projects for plants and wants mid-size manufacturers in Northeast Ohio.

• CBP counts manufacturing establishments with 50 to 249 employees: 238 in Cuyahoga County, 111 in Summit, 81 in Lake, 65 in Lorain and 40 in Medina, 535 in all.
• It assumes half run high-mix production where changeovers matter, about 270 plants.
• At 20 plant visits a month and one project for every eight visits, it starts two or three projects a month at about $60,000 each.

Finding which of the 535 run high-mix lines, and the operations manager at each, is the slow part. Bebop can search for "Northeast Ohio manufacturers with 50 to 249 employees hiring production supervisors" and explain why each fits.

Subject: Changeovers at [Company]'s [city] plant

Hi [first name],

[Company] is hiring [production supervisors], which usually means more orders than hours on the lines. Changeovers are often the quickest place to find the time.

We run four-week changeover projects for Northeast Ohio plants, on the floor with your team, and measure the minutes saved before we invoice. Would a short walk-through of one line be worth an hour of your time?

[Your name], Cuyahoga Lean

Next step: turn a county list into named accounts with how to build a prospect list.