<p>Social support is essential to doctoral students’ success. However, there is a lack of available instruments that tap into the different sources of social support among doctoral students. To fill the gap, this research developed and validated the Perceived Social Support Scale-Doctoral Students (PSSS-DS). An initial item pool of 42 items was generated. Study 1 involved the selection of items and the preliminary validation of the 42-item scale among 376 doctoral students. Exploratory factor analysis in Study 1 resulted in four dimensions of perceived social support: institutional support, 0supervisory support, peer support, and family support. Study 2 involved revising and shortening the original version and testing the within- and between-network validity of the revised version among 472 doctoral students. The within-network validity analyses supported the four-factor structure and provided satisfactory reliability evidence for the 20-item PSSS-DS. The between-network analyses showed that each dimension of the PSSS-DS statistically predicted doctoral students’ subjective well-being. These findings provide strong evidence for the psychometric integrity of this measure assessing doctoral students’ perceived social support.</p>