OHNY Weekend 2011 is made possible with funding from the National Endowment for the Arts, NYC Department of Cultural Affairs in partnership with the NYC Council, Office of Manhattan Borough President Scott Stringer, Bloomberg Philanthropies, New York State Council on the Arts, Hon. Daniel Garodnick, NYC Speaker Christine Quinn, The Council of the City of New York Manhattan Delegation, Jaklitsch / Gardner Architects, The Battery Park City Authority, Marrus Family Foundation, and The Whitman Foundation.

Additional support provided by Historic House Trust, KITE, National Park Service, NYC & Company, NYC Department of Parks & Recreation, Center for Architecture, KidsGuide.com, and Sorrento.

WABC is the official television sponsor of OHNY Weekend 2011. 
WFUV is the official radio sponsor of OHNY Weekend 2011.
Additional media sponsors include The Architect's Newspaper and Time Out New York.