Aging is associated with various heart diseases, and this may be attributable, in part, to the prolonged exposure of the heart to cardiovascular risk factors. However, aging is also associated with heart disorders such as diastolic dysfunction that are not necessarily linked to the risk factors for cardiovascular diseases. Recent studies have demonstrated a mechanistic link between Wnt signaling and premature aging or aging-related phenotypes. As a part of the review series on Wnt signaling and the cardiovascular system, we discuss here the possible involvement of Wnt signaling in aging-associated heart diseases or heart disorders.