Old Country Road is a 17.57-mile-long (28.28 km) major east–west thoroughfare through central Nassau County and extending into western Suffolk County on Long Island, New York.

It serves many of the major shopping centers in central Nassau County including Roosevelt Field Mall.

It then crosses Glen Cove Road/Clinton Road (unsigned CR 1), passing by a series of major shopping centers in Carle Place and Westbury including Roosevelt Field Mall and The Mall at the Source.

It intersects NY 135 in Plainview and briefly overlaps Round Swamp Road (unsigned CR 110) before continuing into western Suffolk County.

In the mid-1970s, Nassau County officials opted to remove all county route signs instead of funding replacements that were compliant with the federal government's Manual on Uniform Traffic Control Devices.