Brewery (Number of groups) (Click a Brewer to view coasters)	Sort by code	Sort by Production Dates *RED = CLOSED*	Sort by city	Sort by count
O'Brien Brewing	OH-OBRI	?-?	Cincinnati	1
Ohio Brewery, Inc. (Ohio Brewing Co.)	OH-OHIB	1908-1919, 1941-1948	Columbus	20
Ohio Brewing Co.	OH-OHI	1997-	Niles, Akron, Cuyahoga Falls	31
Ohio Union Brewing Co.	OH-OHIU	1904-1916	Cincinnati	1
Ol' Fashun Brewing Co.	OH-OLFA	1942-1948	Dayton	3
Old Bridge Brewing Co.	OH-OLDB	2020-	McConnelsville	1
Old Capitol Brewery	OH-OLC	1934-1947	Chillcothe	9
Old Capitol Brewing Co.	OH-OLDC	2021-	Chillicothe	1
Old Dog Alehouse & Brewery	OH-OLDD	2019-	Delaware	5
Old Firehouse Brewery	OH-OLFH	2014-2019	Williamsburg	12
Old Munich Brewing Co. (Tyler Brewing Co.)	OH-OLM	1933-1937	Cincinnati	7
Olde Buckeye Co.	OH-OBUC	?-?	Toledo	2
Olentangy River Brewing	OH-OLEN	2018-	Lewis Center	1
Olt Brothers Brewing Co.	OH-OLT	1907-1941	Dayton	24
Outerbelt Brewing	OH-OUTE	2019-	Carroll	6
Ohio brewers with coasters:				15
Alternate brewer referencess:
total record count:				16