Spring Lake is a borough in Monmouth County, New Jersey, United States. As of the 2010 United States Census, the borough's population was 2,993, reflecting a decline of 574 (-16.1%) from the 3,567 counted in the 2000 Census, which had in turn increased by 68 (+1.9%) from the 3,499 counted in the 1990 Census.New Jersey Monthly magazine ranked Spring Lake as the 240th best place to live in New Jersey in its 2010 rankings of the "Best Places To Live" in New Jersey.HistorySpring Lake was formed as a borough by an act of the New Jersey Legislature on March 14, 1892, from portions of Wall Township, based on the results of a referendum held on March 8, 1892. On February 24, 1903, the borough of North Spring Lake was annexed to Spring lake.During the "Gilded Age" of the late 19th and early 20th centuries, Spring Lake developed into a coastal resort for members of New York City and Philadelphia high society, in similar fashion to the settlements of Newport, Rhode Island and Bar Harbor, Maine. A surviving example of architecture constructed during this era is the Martin Maloney Cottage on Morris Avenue next to the tycoon's former and no longer existent Ballingarry Estate. Another fine example of period architecture listed on the National Register of Historic Places is the Audenried Cottage on Tuttle Avenue.