Insufficient sleep (short sleep duration and poor sleep quality) is associated with obesity risk. Emerging adults (ages 18-28 years) have a greater risk of excess weight gain and insufficient sleep, and these risks are higher in Black individuals. Using a measurement burst design, we assessed associations between sleep with energy balance components and obesity marker changes over 6 months in 15 Black emerging adults (12 females; age 21±2.5 years; body mass index 25.7±4.5 kg/m2; body fat 25.8±11.9%). Since our sample was predominantly female (80%), we repeated our analyses for females only. Participants completed the following measurements at baseline (BLN) and 6 months later (6MO): 7 days of actigraphy-based sleep and physical activity energy expenditure (EE) and 2 nights of in-home polysomnography-based sleep; resting EE and thermic effect of food with indirect calorimetry; ad libitum energy intake (EI) via self-reported methods over 4 days and directly measured over 3 days with provided meals. Body weight (2.6 kg, p=0.01) and waist circumference (2.4 cm, p=0.03) increased from BLN to 6MO. Changes in actigraphy-based sleep duration were associated with changes in body weight (β=0.03, Standard error (SE)=0.02, p=0.04) and fat mass (β=0.07, SE=0.03 p=0.03) in females only. Greater rapid eye movement sleep duration was associated with increases in resting EE (β=2.24, SE=0.84, p=0.02). Greater slow-wave sleep was associated with increases in self-reported EI (β=18.34, SE=4.7, p<0.01). Sleep may impact components of energy balance and risk of weight gain in Black emerging adults. Additional research is needed to confirm our pilot findings.