State Road 511 (NM 511) is a 32.346-mile-long (52.056 km) state highway in the US state of New Mexico.

NM 511's southern terminus is at U.S. Route 64 (US 64) southwest of Turley, and the northern terminus is at Colorado State Highway 172 (SH 172) at the New Mexico/ Colorado state line.

The entire route is in San Juan County.

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