The Times reports that Ford was taken from the scene by ambulance.
During a televised press briefing, Asst. Chief Patrick Butler, of the Los Angeles Fire Department, said the man on the plane suffered "moderate trauma" but was "alert and conscious."
TMZ, which obtained audio from a dispatch Ford made to a control tower, reports Ford reported engine failure and requested "an emergency return to the airport."
Variety reports that Ford is in "fair to moderate condition."
"The plane clipped some tree branches and crashed on the golf course shortly after takeoff from Santa Monica Airport, Butler said. An eyewitness, Howard Tabe, an employee at Penmar Golf Course, said he put a blanket under Ford's hip.
"'There was blood all over his face,' Tabe said. 'Two very fine doctors were treating him, taking good care of him.'"
Ford is best known for his role as Indiana Jones in Raiders of the Lost Ark and as Hans Solo in the Stars Wars trilogy.
NPR's Russell Lewis tells us that Ford is also "a highly-skilled and highly-rated pilot. He's qualified to fly single and twin engine planes, sea planes, helicopters and he's also an instrument-rated pilot."
Update at 8:24 p.m. ET. Ford Is 'Battered, But OK":
Ben Ford, Harrison Ford's son, tweeted that his dad is OK: