Thornwood is a hamlet located in the town of Mount Pleasant in Westchester County, New York, United States. It is situated about 30 miles north of New York City, and has a population of around 3,800 people. Thornwood is known for its quiet suburban atmosphere, and is primarily a residential community, with a mix of single-family homes, townhouses, and apartment complexes. The hamlet features several parks and recreational areas, including the North County Trailway, which has hiking and biking trails that run through Thornwood and other nearby communities. The hamlet is situated near several major highways, providing easy access to New York City and other nearby destinations.