Fear of falling has many health consequences among older adults and may lead to curtailment of activities, immobility, functional dependence, falls, and serious injury. The lack of clarity as to how to best measure fear of falling among high-risk, community-dwelling older adults defined as those who are nursing home eligible, functionally dependent, and vulnerable is further complicated by the multiple definitions used throughout the science. Fear of falling is important to measure effectively if we are to develop and test interventions to promote safe aging in place and prevent injury and institutionalization. This integrative review, 1982 to the present, leads to the conclusion that the Falls Efficacy Scale-International (FES-I) long form stands out as the most appropriate measurement tool to best assess fear of falling in this unique, understudied, and underserved population.