The acronym "SSA" stands for the Social Security Administration, the government agency that oversees the disbursal of SSI, or Supplemental Security Income, funds, according to the Social Security Administration. The SSA administers all Social Security-related programs.
Benefits from SSI are targeted toward disabled adults and children who lack access to supporting resources, according to the Social Security Administration. The program is also available to seniors who meet income requirements. The SSA administers retirement benefits, disability benefits and survivor's benefits. The SSA also aids in the administration of Medicare benefits, a health program available for seniors, according to the agency's website.