James Stephan Rossant (August 17, 1928 – December 15, 2009) was an American architect, artist, and professor of architecture.A long-time Fellow of the American Institute of Architects, he is best known for his master plan of Reston, Virginia, the Lower Manhattan Plan, and the UN-sponsored master plan for Dodoma, Tanzania.
He was a partner of the architectural firm Conklin & Rossant and principal of James Rossant Architects.