State Road 566 (NM 566) is a 11.644-mile-long (18.739 km) state highway in the US state of New Mexico.

NM 566's southern terminus is at NM 118 and Historic U.S. Route 66 (Hist US 66) in Church Rock, and the northern terminus is at the end of state maintenance by Church Rock Mine.

The entire route is in McKinley County.