SAN FRANCISCO — From her apartment at the foot of the celebrated zigzags of Lombard Street, Judith Calson has twice peered out her window as thieves smashed their way into cars and snatched whatever they could. She has seen foreign tourists cry after cash and passports were stolen. She shudders when she recounts the story of the Thai tourist who was shot because he resisted thieves taking his camera.

And that is her tally from the last year alone.

“I never thought of this area as a high-crime neighborhood,” Ms. Calson, a retired photographer, said of this leafy part of the city, where tourists flock to view the steeply sloped, crooked street adorned with flower beds.

San Francisco, America’s boom town, is flooded with the cash of well-paid technology workers and record numbers of tourists. At the same time, the city has seen a sharp jump in property crime, up more than 60 percent since 2010, though the actual increase may be higher because many of the crimes go unreported.

Recent data from the F.B.I. show that San Francisco has the highest per-capita property crime rate of the nation’s top 50 cities. About half the cases here are thefts from vehicles, smash-and-grabs that scatter glittering broken glass onto the sidewalks.