Clinodactyly can be broadly defined as curvature of the finger(s) occurring distal to the metacarpophalangeal joint(s). The most common form of clinodactyly involves a radial curvature of the fifth finger. This dataset provides measured fifth finger curvature (left and right) in a sample of 1,295 U.S. adults recruited from the Western Pennsylvania region as part of two large epidemiological studies...