Nassau County is the northeasternmost county of the U.S. state of Florida. According to the 2020 United States Census, the county’s population was 90,352. The county seat and the largest incorporated city is Fernandina Beach.
Nassau County is the northeasternmost county of the U.S. state of Florida. According to the 2020 United States Census, the county’s population was 90,352. The county seat and the largest incorporated city is Fernandina Beach.