160th Annual St. Patrick's Day Festival and Parade on March 12th.
In addition to the parade, look for a petting zoo, kids' carnival, pony rides, bounce houses, music, dancing, food and more.
When: March 12 from 10 a.m. to 5 p.m.
The parade begins at 11:30 (at Second and Market)
Where: Civic Center Plaza, SF
Red Tricycle has a list of other St. Patrick's Day festivities.