Naples-Marco Island, FL - Resident Population in Naples-Immokalee-Marco Island, FL (MSA) was 416.23300 Thous. of Persons in January of 2024, according to the United States Federal Reserve. Historically, Naples-Marco Island, FL - Resident Population in Naples-Immokalee-Marco Island, FL (MSA) reached a record high of 416.23300 in January of 2024 and a record low of 254.07000 in January of 2000. Trading Economics provides the current actual value, an historical data chart and related indicators for Naples-Marco Island, FL - Resident Population in Naples-Immokalee-Marco Island, FL (MSA) - last updated from the United States Federal Reserve on April of 2026.