Viking is an unincorporated community in St. Lucie County, Florida, United States. Viking is located along U.S. Route 1, 7 miles (11 km) north-northwest of Fort Pierce.

The town was founded by a Norwegian immigrants Jens (1858-1944) and Agathe Helseth and was so named for a large community of Scandinavians. At one time, there was a school and a post office in addition to the Helseth pineapple farm. The Helseth estate was donated to the State of Florida.