Robert E. Simon was an American real estate developer and urban planner, best known for founding the planned community of Reston, Virginia in 1964. He envisioned a community that integrated residential, commercial, and recreational spaces, promoting a balanced lifestyle for its residents. Simon was also a proponent of sustainable development and community engagement. His innovative approach to urban planning emphasized the importance of green spaces and public amenities, influencing the design of many modern communities across the United States. His work has left a lasting impact on urban development practices.