The current study examined factors related to fatigue in family caregivers of individuals with dementia using a cross-sectional design to collect subjective and objective data. Findings indicated that caregivers' sleep quality, difficulty falling asleep, and depression, as well as care-recipients' functionality, were associated with family caregivers' fatigue. Regression analysis indicated that only sleep quality significantly predicted caregivers' fatigue. Study findings suggest fatigue is common among family caregivers of individuals with dementia and may be related to sleep quality. The level of fatigue identified in the current study warrants further study with larger and more diverse samples.