The Robotics Institute Summer Scholars Working Papers Journal is an annual publication of the Robotics Institute’s Summer Scholars Program at Carnegie Mellon University. The journal is a medium for the undergraduate students of the summer research program to communicate their work in collaboration with the participating lab faculties. This journal encompasses the learnings and research findings of the students over the eleven-week-long remote engagement with the CMU community for the year 2021. The journal comprises 58 papers written by the scholars participating in RISS 2021. The papers explore various domains of Robotics, including Localization, Mapping, Computer Vision, Motion-planning, Controls, Haptics, Aerial Systems, Medical Robotics, Multi-agent Systems, Machine Learning, and Reinforcement Learning.