The collision was reported at 3:11 p.m. at California and Fillmore streets, fire spokeswoman Mindy Talmadge said.
The pedestrian was taken to San Francisco General Hospital, Talmadge said. She did not immediately have information on the woman's condition.
San Francisco Municipal Transportation Agency officials posted on Twitter that the incident was causing delays on Muni's 3-Jackson and 22-Fillmore bus lines.
