State Road 345 (NM 345) is a 3.6-mile-long (5.8 km) state highway in the US state of New Mexico.

NM 345's southern terminus is at Rio Bravo Blvd.

in Albuquerque, and the northern terminus is at Northern Boulevard in Rio Rancho, NM.

NM 345 is signed as Unser Boulevard in Albuquerque and Rio Rancho.

The entire route is in Albuquerque, Bernalillo County.