Greenvale is a small town located in the state of New York. It is located in the town of Hempstead in Nassau County. The population of Greenvale is approximately 2,000 people. The town is known for its quaint atmosphere and its close proximity to New York City. It is home to a variety of shops, restaurants, and other businesses. The town is also home to a number of parks and recreational areas, including the Greenvale Nature Preserve.