USSF

USSF may refer to:
 * United States Servicemen's Fund, a support organization for soldier and sailor resistance to the Vietnam War and the U.S. military
 * United States Soccer Federation, governing body of soccer in the United States
 * United States Social Forum, activist organization
 * United States Space Force, the space service branch of the United States Armed Forces
 * US Sumo Federation, governing body of sumo in the United States