Ontario Limestone Company

Ontario Limestone Company is a premier producer of high-quality dimensional limestone products, operating from proprietary quarries located 15 minutes north of Orillia, Ontario, on the northern edge of the Gull River geological formation. The company extracts and manufactures a wide range of natural limestone and dolomitic stone products designed to meet the needs of the landscape and building industries across Ontario and beyond.

The quarry's unique geological position within the Gull River formation gives Ontario Limestone Company access to dolomite-rich stone with a distinctive range of color and texture, setting its products apart from imported alternatives. Every product is sourced directly from the company's own quarries, ensuring consistent quality, reliable supply, and the personal attention that only a hands-on operation can provide.

The company serves a broad customer base including homeowners, cottage owners, architects, designers, landscape architects, builders, contractors, landscapers, and commercial project teams. Its product line includes natural and guillotined armour stone, armour stone retaining walls, limestone stair treads, flagstone, square cut and jumbo flagstone, limestone building stone, veneer, cladding, sills, and coping stones.

With modern quarrying equipment and deep experience in both stone production and landscape construction, Ontario Limestone Company delivers consistent, reliable results for projects of every scale. Quality, customer service, and personal attention are at the core of everything the company does.