In this study, the required core competencies for home care workers were explored, comparing the differences between and factors that affect the perceived importance and actual performance of core competencies. A structured questionnaire survey was conducted; by 264 home care workers in Yunlin County, Taiwan. The results are as follows: (1) the mean perception of core competencies for home care workers was scored between important and very important; (2) the home care workers possessed positive attitudes toward the 8 core competencies, including personality, service attitude, interpersonal communication, problem solving, professional knowledge, professional skills, work ethic, and self- and professional development; (3) the perceived importance of core competencies in home care workers was higher compared with the core competency levels they possessed; and (4) professional knowledge and self- and professional development were areas in which the home care workers felt inadequate and should improve first. These core competencies can be used as a reference for selecting home care workers. Finally, recommendations are offered for the research tools and participants in future studies.