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Manufacturing in Seneca County, Ohio

The register lists 79 facilities in Seneca, Ohio. According to the Bureau of Labor Statistics, 51 establishments in Seneca reported 3,147 employees in 2025. Transportation Equipment Manufacturing is listed in the register 10 times.

SUMMARIZED FROM THE FEDERAL FIGURES ON THIS PAGE

Map, cities and benchmark

Biggest cities

Federal labor statistics counted at least 51 manufacturing establishments in Seneca County in 2025, employing about 3,147 people, counting only the industry subsectors the Bureau of Labor Statistics discloses at this level. This registry lists 79.

Facilities19 FACILITIES

Listing 19 of 30: the facilities with a website, a size band or two sources on record. The rest are in site search.

FacilityCityIndustryNAICSEmployeesStatus
National Electrical Carbon Products, INCFostoriaElectrical Equipment, Appliance & Component Manufacturing335991100–499 ACTIVE
Poet Biorefining-fostoriaFostoriaChemical Manufacturing32519320–99 ACTIVE
Roppe Corporation (0374010077)FostoriaPlastics and Rubber Products Manufacturing326299100–499 LIKELY ACTIVE
NSI CrankshaftFostoriaTransportation Equipment Manufacturing33631020–99 LIKELY ACTIVE
Nox USFostoriaPlastics and Rubber Products Manufacturing326112100–499 LIKELY ACTIVE
Material Processing and Handling COFostoriaPlastics and Rubber Products Manufacturing3261991–19 UNVERIFIED
Autolite (0374010117)FostoriaTransportation Equipment Manufacturing336320— LIKELY ACTIVE
Inland Tarp & Liner LLCFostoriaTextile Product Mills314910— LIKELY ACTIVE
Kohart Recycling of FostoriaFostoriaPrimary Metal Manufacturing331314— LIKELY ACTIVE
Nox US LLC (0374012005)FostoriaPlastics and Rubber Products Manufacturing326130— LIKELY ACTIVE
Alpha Coatings, INC.FostoriaPlastics and Rubber Products Manufacturing326199— UNVERIFIED
Thyssenkrupp Crankshaft CO LLCFostoriaFabricated Metal Product Manufacturing332111— UNVERIFIED
Aviation MFGFostoriaMachinery Manufacturing33351720–99 LIKELY ACTIVE
Custom Glass SolutionsFostoriaNonmetallic Mineral Product Manufacturing327215100–499 LIKELY ACTIVE
Filmtec Fabrications, LLCFostoriaMachinery Manufacturing33351920–99 LIKELY ACTIVE
ITL FostoriaFostoriaTextile Product Mills31491020–99 LIKELY ACTIVE
Mennex Processing & PackingFostoriaFood Manufacturing31182420–99 LIKELY ACTIVE
Callies Performance Products, INC.FostoriaTransportation Equipment Manufacturing336399100–499 UNVERIFIED
Machine Tool Design & Fab LLCFostoriaFabricated Metal Product Manufacturing33271020–99 UNVERIFIED

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