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is a town and an island in Erie County, New York, USA. As of the 2000 census, the town population was 18,621. The current town name derives from the French name "La Grande Ile," as Grand Island is the largest island in the Niagara River. The phrase "La Grande Ile" appears on the town seal.
is located at the northwestern corner of the county. The town is northwest of Buffalo, New York. Interstate 190 and New York State Route 324 cross the island.
According to the United States Census Bureau, the town has a total area of 33.3 square miles (86.2 km²), of which, 28.5 square miles (73.8 km²) of it is land and 4.8 square miles (12.4 km²) of it (14.35%) is water.
in the Niagara River. The river splits into two parts at the south end of the island and rejoins at the northwest end, before flowing west to the Niagara Falls.
The town lies adjacent to the international border between Ontario in Canada and the United States. As there is no direct bridge or ferry connection from the island to Canada, there are no customs or immigration services available. Paired bridges connect the south end of the island to the Town of Tonawanda, and another pair of bridges connects the northern end to the City of Niagara Falls in Niagara County. The two sets of bridges are connected by Interstate 190, a branch of the New York State Thruway (Interstate 90). In addition, New York State Route 324 (Grand Island Boulevard) is conjoined with I-190 at the southern bridges and reaches its western terminus in the northern part of Grand Island.