The purpose of this study was to test the structural and criterion validity of scores derived from the Relatedness to Others in Physical Activity Scale (ROPAS). The participants (n1 = 893; n2 = 522) completed the ROPAS in addition to demographic questions (study 1) and well‐being indicators (study 2) using cross‐sectional, nonexperimental surveys. Confirmatory factor analysis (study 1) supported the tenability of a 6‐item ROPAS measurement model that was invariant across gender. Higher ROPAS scores were associated with greater perceived autonomy and competence and greater well‐being (study 2). Overall, these findings suggested the ROPAS displays a number of psychometric properties that render the instrument useful for investigating issues of belonging and connectedness with others in global physical activity settings.