Objective: To determine the prevalence of weight gain attempts in adolescent boys in the US.Methods: Participants were 15,624 high school students from the nationally representative 2015 Youth Risk Behavior Survey.Results: Overall, 29.6% of adolescent boys reported attempts to gain weight, including 39.6% of boys who were normal weight, 12.8% who were overweight, and 10.6% who were obese by body mass index (BMI). In contrast, only 6.5% of adolescent girls reported attempts to gain weight. Although only 3.3% of adolescent males are underweight by BMI, 19.3% perceive themselves to be underweight. Further, over half of adolescent males who are overweight by BMI perceive themselves to be about the right weight. Black/African American (Odds ratio [OR] 1.89; 95% confidence interval [CI] 1.50-2.38) and multiracial (OR 1.62; 95% CI 1.16-2.26) adolescent males had greater odds of weight gain attempts than White adolescent males. Adolescent males identifying as bisexual had lower odds (OR 0.47; 95% CI 0.25 -0.88) of weight gain attempts than adolescent males identifying as heterosexual.Conclusions: Weight gain attempts are common among adolescent boys including those who are considered normal weight, overweight, or obese by BMI; African American or multiracial; and those self-identifying as heterosexual. Consideration of the unique nature of male body image,