When Social Security was just getting started back in 1935, the average American's life expectancy was just under age 60. Today it's more than 25 percent longer at just over 76. That means workers have more time for retirement, and more time to collect Social Security. And that's why Social Security's retirement age is gradually changing...to keep pace with increases in longevity. Workers born before January 2,1938 can collect full benefits at age 65. For those born after that date, the age to collect full benefits is gradually being raised to age 67.

See what your retirement age is or you can file for retirement benefits online.