Disclosed is the seed of a novel soybean variety, designated SM14307266, asample ofwhich is deposited under ATCC Accession No. PTA-123574. Also disclosed areplants, orparts thereof, grown from the seed of the variety, plants having themorphological andphysiological characteristics of the SM14307266 variety, and methods of usingthe plant orparts thereof in a soybean breeding program. The invention also relates tocells and uses ofsoybean variety SM14307266.