Buddle previously featured for the Galaxy from 2007-2010, notching 42 goals in 87 regular season games over that stretch.
"I am thrilled to be able to return to MLS and a club that has meant so much to me in my career," Buddle said. "When I left for Germany last winter, I said that I hoped to be able to one day return to the Galaxy and help lead the club to an MLS Cup championship. That day is today and I look forward to the challenges that now lie ahead."
Galaxy head coach Bruce Arena was spoke about his club's new coup, stating that he is excited to be reunited with the 30-year-old.
"We're really excited to have Edson re-joining the L.A. Galaxy," Arena said. "He has been an outstanding player for us in the past and we look forward to him continuing that success for many years to come."
Buddle has also garnered 10 caps for the United States National Team, scoring three goals. He was named to the 2010 World Cup squad under Bob Bradley and made substitute appearances against England and Algeria in the group stage.
Terms of the deal, which is still subject to the receipt of Buddle's International Transfer Certificate, were not disclosed.