Edgemont, also known as Greenville, is an unincorporated community (or "hamlet" in local parlance) and Census Designated Place located in the southern Hudson Valley of New York State within Westchester County in the Town of Greenburgh. The hamlet is effectively co-terminus with the Edgemont Union Free School District. Commuter rail access to New York City is available from Scarsdale Station along the village's eastern border in neighboring Scarsdale.

Edgemont's proximity just to the west of the Scarsdale train station continues to be a draw for commuters, but the hamlet has kept a relatively low-profile despite its convenient location and leafy surroundings. Residents cannot speak more highly of its public schools, which they prize for both their small size and academic rigor. The close-knit community has in recent years forged an even stronger bond in its effort to incorporate Edgemont as its own village, which continues to reverberate in local courtrooms and councils.