Primary Metal Manufacturing in Ohio

NAICS 331 · OH

The register lists 697 facilities in Ohio. According to the Bureau of Labor Statistics, there were 456 establishments in the Primary Metal Manufacturing industry in Ohio in 2025. CLEVELAND-CLIFFS STEEL CORP, located in Middletown, employed 2,296 people in 2025.

SUMMARIZED FROM THE FEDERAL FIGURES ON THIS PAGE

Plants in Ohio520 FACILITIES

Listing 520 of 697: the facilities with a website, a size band or two sources on record. The rest are in site search.

Facility	City	Employees	Status
FCFord Cleveland Casting Plant	Brook Park	—	◐ LIKELY ACTIVE
FIFusion INC Plant No 2	Willoughby	—	◐ LIKELY ACTIVE
GAGeneral Aluminum (1667070012)	Ravenna	—	◐ LIKELY ACTIVE
GAGeneral Aluminum Manufacturing CO	Conneaut	—	◐ LIKELY ACTIVE
GDGm Defiance Casting Operations	Defiance	—	◐ LIKELY ACTIVE
GAGnw Aluminum INC	Alliance	—	◐ LIKELY ACTIVE
GWGriffin Wheel Columbus Plant	Groveport	—	◐ LIKELY ACTIVE
HAHowmet Aerospace INC - Cleveland Works	Cuyahoga Heights	—	◐ LIKELY ACTIVE
LCLiverpool Coil Processing	Valley City	—	◐ LIKELY ACTIVE
MRMagretech-magnesium Refining Technology	Bellevue	—	◐ LIKELY ACTIVE
MMetaldyne	Twinsburg	—	◐ LIKELY ACTIVE
MRMetallic Resources INC	Twinsburg	—	◐ LIKELY ACTIVE
NCNovelis Corporation (0278080136)	Warren	—	◐ LIKELY ACTIVE
OIOsco Industries, INC. New Boston Divisi (0773010180)	New Boston	—	◐ LIKELY ACTIVE
OIOsco Industries INC Portsmouth Div	Portsmouth	—	◐ LIKELY ACTIVE
OKO.s. Kelly Company (0812100276)	Springfield	—	◐ LIKELY ACTIVE
PCPioneer City Casting CO	Belpre	1–19	◐ LIKELY ACTIVE
PIPremier Investment Castings Dba Bimac	Dayton	20–99	◐ LIKELY ACTIVE
RAReal Alloy Specialty Products LLC	Elyria	—	◐ LIKELY ACTIVE
RTRmi Titanium CO LLC - Canton Ingot Operations	Canton	—	◐ LIKELY ACTIVE
SISeilkop Industries, INC.	Cincinnati	20–99	◐ LIKELY ACTIVE
SCSeville Centrifugal Bronze INC	Seville	—	◐ LIKELY ACTIVE
Skyline Steel	Belpre	—	◐ LIKELY ACTIVE
SSSolon Specialty Wire CO	Solon	—	◐ LIKELY ACTIVE
SMSt. Marys Foundry INC. (0306010004)	Saint Marys	—	◐ LIKELY ACTIVE
TAThompson Aluminum Casting CO	Cuyahoga Heights	20–99	◐ LIKELY ACTIVE
TCTimkensteel CORP - Faircrest Steel Plant	Canton	—	◐ LIKELY ACTIVE
WTWheatland Tube - Warren, a Div. of Zekelman Industries (0278080757)	Warren	—	◐ LIKELY ACTIVE
WOWhemco - Ohio Foundry INC (0302020023)	Lima	—	◐ LIKELY ACTIVE
WSWorthington Steel	Cuyahoga Heights	—	◐ LIKELY ACTIVE
YIYoder Industries INC	Dayton	—	◐ LIKELY ACTIVE
BMBull Moose Tube CO - Masury Plant	Masury	—	◇ UNVERIFIED
LHL & H Threaded Rods CORP	Dayton	—	◇ UNVERIFIED
MMagnode	Trenton	—	◇ UNVERIFIED
RCReliable Castings CORP	Sidney	—	◇ UNVERIFIED
RCRock Creek Aluminum INC	Rock Creek	—	◇ UNVERIFIED
TFTiffin Foundry & Machine	Tiffin	1–19	◇ UNVERIFIED
AHAmerican Heavy Plates	Clarington	100–499	◐ LIKELY ACTIVE
American Wire and Cable Co	Olmsted Twp	20–99	◐ LIKELY ACTIVE
ASAstro Shapes LLC	Struthers	500+	◐ LIKELY ACTIVE
BEBrothers Equipment, INC.	Cleveland	20–99	◐ LIKELY ACTIVE
CSCast Specialties INC	Warrensville Heights	20–99	◐ LIKELY ACTIVE
CSCleveland-cliffs Steel Corporation	West Chester	500+	◐ LIKELY ACTIVE
CSCliffs Steel INC	Cleveland	500+	◐ LIKELY ACTIVE
CSCoronado Steel CO	Youngstown	20–99	◐ LIKELY ACTIVE
HCHTCI, Co.	New Carlisle	20–99	◐ LIKELY ACTIVE
MIMagretech Incorporated	Bellevue	20–99	◐ LIKELY ACTIVE
MMMidwest Manufacturing & Logistics LLC	Minster	20–99	◐ LIKELY ACTIVE
OKO.S. Kelly Company	Springfield	20–99	◐ LIKELY ACTIVE
SISemco INC	Marion	20–99	◐ LIKELY ACTIVE

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