Stuart is a city in and the seat of Martin County, Florida, United States. Located on Florida's Treasure Coast, Stuart is the largest of four incorporated municipalities in Martin County. The estimated population is 16,543 according to the most recent United States census estimates. Stuart is the 126th largest city in Florida based on official 2017 estimates from the US Census Bureau. It is part of the Port St. Lucie, Florida Metropolitan Statistical Area.
Stuart is frequently cited as one of the best small towns to visit in the U.S., in large part because of its proximity to the St. Lucie River and Indian River Lagoon.