STEMCivics has attracted an outstanding and diverse group of friends who are eager to support the school in its mission. The group includes:
- government agencies on the national and state levels (United States Environmental Protection Agency, the United States Geological Society, and the New Jersey Department of Environmental Protection)
- the Liberty Science Center
- institutions within Princeton University (the PACE Center for Civic Engagement, Community House, and the Community-Based Learning Initiative)
- We Care Solar, an organization that orchestrates building solar-powered suitcases and their deployment to medical facilities in developing countries that do not have reliable electricity​
- Scistarters and its sister group, Science Cheerleaders