Port Saint Lucie (lōˈsē) [key], city (1990 pop. 55,866), St. Lucie co., central E Fla., on the St. Lucie River; inc. 1961. Fabricated metal products, trailers, printing materials, and processed stone are produced; tourism and telemarketing are also important. A tiny town in the 1960s, it experienced astonishing growth in the late 20th cent., fueled in part by a desire for less expensive housing. The spring training camp of the New York Mets and a PGA school and golf club are there.