Harleysville Worcester Insurance, the oldest insurance company based in Massachusetts, provides multiple lines of commercial property and casualty coverage in the northeastern US. A network of independent agents sell the company's products, which include workers' compensation and home-owned business policies. The firm writes insurance in Connecticut, Maine, Massachusetts, New Hampshire, New York, Rhode Island, and Vermont; it is also licensed in Michigan and Ohio. Worcester Insurance Company, established in 1823, was acquired by Harleysville Group in 1983; the present name was adopted in 2001.