Studies of service learning suggest that students and instructors believe it benefits students. Nevertheless, the literature is still lacking in methods for assessing the effectiveness of service learning. This research helps fill this gap by developing, validating, and evaluating a service learning survey for a marketing research course (the MR-SL scale). The survey captures four important dimensions for assessing perceived student learning and satisfaction, and assesses student learning more comprehensively than other service learning scales. The results demonstrate that students describe learning about marketing research, developing critical thinking skills, gaining value in working with others, and contributing to the community.