Grand Island is an unincorporated community in Lake County, Florida, set on the north shore of Lake Eustis within the Harris Chain of Lakes, roughly 3.5 miles northwest of the city of Eustis. With its own post office and ZIP code 32735, it forms part of the Orlando-Kissimmee-Sanford metropolitan area, though its character is distinctly that of a small lakefront community rather than a dense suburb. The area's settlement traces to the late 19th century, when Major R. McR. Byrne became its first known settler. The community grew around the region's lakes, which for generations drew citrus growers, fishermen, and seasonal visitors drawn to Central Florida's waterways and mild winters. Today Grand Island remains unincorporated, with local services provided by Lake County and its municipal neighbors, and its identity continues to be shaped by the water. The community's defining feature is the Harris Chain of Lakes. Lake Eustis, which borders Grand Island, is spring-fed and connects to Lake Harris by way of the Dead River and to the broader chain and the St. Johns River system beyond, making the area a natural base for boating and fishing. Homes range from established subdivisions such as Wedgewood and Grand Island Estates to newer neighborhoods like Grand Island Ridge and Grand Island Reserve, with both lakefront and interior settings. Children in Grand Island attend Lake County Schools, which operates 49 schools across the county, and residents rely on nearby Eustis, Mount Dora, and Tavares for shopping, dining, and services. For homebuyers, Grand Island offers lake-oriented, low-density living with convenient access to Central Florida's amenities and a short drive to the historic downtowns that give this corner of Lake County its appeal.