Purpose: The study aimed to identify factors related to family caregivers' sleep. Design and Methods: The study used a cross‐sectional design with objective and subjective methods to measure sleep in the home setting over a 7‐day period. Findings: Findings indicated that poor sleep quality was found in 91.7% of the caregiver participants. Depression, sleep hygiene, burden, and care‐recipients' sleep were significant predictors of various dimensions of caregivers' sleep. Practice Implications: Our study suggests that sleep quality for family caregivers of individuals with dementia varies considerably from night to night. Understanding the complex interrelationships among caregivers' sleep and other contributing variables is an important first step toward the development of individualized and effective treatment strategies.