Salvador Ceja, 77, apparently walked away from a residence on the 100 block of Schwerin Street at about 8:45 a.m. Saturday, San Francisco police spokesman Sgt. Michael Andraychak said.
Ceja is described as 5 feet 4 inches tall, 150 pounds, with black hair and brown eyes. He was last seen wearing a white shirt with black dots, and black jeans.
He suffers from dementia and diabetes, Andraychak said.
Anyone with information is requested to call (415) 558-5508.