The Worcester County Horticultural Society is a non-profit American horticultural society based in Boylston, Massachusetts, US, whose stated mission in 2014 was to "inspire the use and appreciation of horticulture to improve lives, enrich communities and strengthen commitment to the natural world", building upon its founding mission to "advanc[e] the science and encourag[e] and improv[e] the practice of [h]orticulture". Formally established in 1842, it describes itself as the third-oldest horticultural society in the United States after the Pennsylvania Horticultural Society and the Massachusetts Horticultural Society. Today, the society's work predominantly focuses in organizing and operating Tower Hill Botanic Garden, as well as supporting the Cary Award, an award program for excellence in New England cultivation practices.