Background: The International Classification of Functioning, Disability, and Health includes important considerations of environmental context in understanding disability, but the environmental impact is often difficult to measure. Purpose: Demonstrates the use of Geographic Information Systems (GIS) and Global Positioning Systems (GPS) in rehabilitation research in assessing accessibility and participation; describes how to use these methods, and presents several considerations in using GIS and GPS in research. Method: Using methods from public health and medical geography, this article describes how to apply GIS and GPS technologies to rehabilitation research to measure community participation and accessibility to resources. Findings: Directions for using ArcGIS functions and case examples joining these mapping technologies with rehabilitation measures are provided. Conclusions: Together with traditional measures, these technologies may provide rehabilitation researchers a more comprehensive approach to assessing accessibility and participation. [This article was presented at the 18th annual National Council on Rehabilitation Education Conference (NCRE), Anaheim, California, March 13-15, 2018.]