Cinnaminson Township is a township in Burlington County, New Jersey, United States. Cinnaminson Township borders the Delaware River, and is an eastern suburb of Philadelphia. As of the 2010 United States Census, the township's population was 15,569, reflecting an increase of 974 (+6.7%) from the 14,595 counted in the 2000 Census, which had in turn increased by 12 (+0.1%) from the 14,583 counted in the 1990 Census.

Cinnaminson was incorporated as a township by an act of the New Jersey Legislature on March 15, 1860, from portions of Chester Township (now known as Maple Shade Township and having no connection to the Morris County community that still bears that name). Portions of the township were taken to form Delran Township (February 12, 1880), Riverton (December 18, 1893) and Palmyra (April 19, 1894).