The Top U.S. Foundations by Size of Assets (as of 2006)

The majority of these foundations are not limited to the state indicated

www.gatesfoundation.org    Bill and Melinda Gates Foundation (WA)
www.fordfound.org  Ford Foundation (NY)
www.rwjf.org  The Robert Wood Johnson Foundation (NJ) 
www.wkkf.org  TheW.K. Kellogg Foundation (MI) 
www.packard.org  The David and Lucile Packard Foundation (CA)
www.calendow.org  The California Endowment (CA)
www.aecf.org  The Annie E. Casey Foundation (MD) 
www.rockfound.org  The Rockefeller Foundation (NY)
www.dukeendowment.org  The Duke Endowment (NC)
www.mcknight.org  The McKnight Foundation (MN)
www.casey.org  Casey Family Programs (WA)
www.knightfdn.org  John S. and James L. Knight Foundation (FL)
www.woodruff.org  Robert W. Woodruff Foundation Inc. (GA)
http://hjweinbergfoundation.org  The Harry and Jeanette Weinberg Foundation (MD)
www.houstonendowment.org  Houston Endowment Inc. (TX)
www.cct.org  The Chicago Community Trust (IL)
www.brownfoundation.org  The Brown Foundation Inc. (TX)
www.marincf.org  Marin Community Foundation (CA)
www.tcwf.org  The California Wellness Foundation (CA)
www.columbusfoundation.org  The Columbus Foundation (OH)
www.weingartfnd.org  Weingart Foundation (CA)
www.hallfamilyfoundation.org  Hall Family Foundation (MO)
www.calfund.org  California Community Foundation (CA)
www.ocf1.org  The Oregon Community Foundation (OR)
www.bushfoundation.org  Bush Foundation (MN)
www.caseygrants.org  Marguerite Casey Foundation (WA)
www.cftexas.org  Communities Foundation of Texas, Inc. (TX)
www.cmwf.org  Commonwealth Fund (NY)
www.pittsburghfoundation.org  The Pittsburg Foundation (PA)
www.minneapolisfoundation.org  The Minneapolis Foundation (MN)
www.saintpaulfoundation.org  The Saint Paul Foundation, Inc. (MN)
www.gsecclesfoundation.org  George and Dolores Dore Eccles Foundation (UT)
www.atlcf.org  Community Foundation for Greater Atlanta (GA)
www.pipertrust.org  The Virginia G. Piper Charitable Trust (AZ) 
www.nycommunitytrust.org  The New York Community Trust (NY)
www.msdf.org  Michael and Susan Dell Foundation
www.moodyf.org  The Moody Foundation (TX) 
www.theahmansonfoundation.org The Ahmanson Foundation (LA, CA)
www.mfi.org  The Meadows Foundation, Inc. (TX)
www.sff.org  The San Francisco Foundation (CA)
www.murdock-trust.org  M. J. Murdock Charitable Trust (WA)
www.tbf.org  Boston Foundation Inc. (MA)
www.hearstfdn.org  William Randolph Hearst Foundation (NY)