Jamaica Plain is a neighborhood of 4.4 square miles (11 km2) in Boston, Massachusetts, United States. Settled by Puritans seeking farmland to the south, it was originally part of Roxbury. The community seceded from Roxbury during the formation of West Roxbury in 1851 and became part of Boston when West Roxbury was annexed in 1874. In the 19th century, Jamaica Plain became one of the first streetcar suburbs in America and home to a significant portion of Boston's Emerald Necklace of parks, designed by Frederick Law Olmsted.