The Lagassey Farm is a historic farmstead at 786 Main Street in St. Agatha, Maine. The 162-acre (66 ha) property is locally significant as a farm property that was worked continuously by the same family for more than 150 years, dating to the period of the area's earliest settlement. Its surviving buildings are all 20th century structures, but may contain elements of older buildings. The property was listed on the National Register of Historic Places in 2009, and was delisted in 2020.