The value of land for sale in Montgomery County recently on Land.com was nearly $24 million. This represents nearly 2,000 acres of farms and rural real estate for sale in Montgomery County. Montgomery County ranks 46th out of 62 counties in New York for the combined amount of land currently advertised for sale. Amsterdam featured the most land for sale. Montgomery County is New York's 51st biggest county (410 square miles). It's located in the Central New York region of New York.