100 Pine Center, Office skyscraper in Financial District, San Francisco, US

100 Pine Center is a class-A office building at the northwest corner of Pine Street and Front Street in San Francisco's Financial District. It rises 145 m (476 ft) with 33 floors and holds 402,500 sq ft (37,000 m2) of rentable office space, plus a 150-car garage including 30 valet parking spaces.

The structure opened in 1972 as the corporate headquarters for Continental Insurance Company. It marked an important phase when modern office towers began defining San Francisco's skyline.

The building reflects the confidence placed in financial expansion during the 1970s and draws daily workers and visitors who shape business activity in the district. Its appearance and location make it an everyday reference point for those working in or visiting the financial quarter.

The tower is centrally located in the Financial District with easy access via public transportation that runs frequently through the area. Visitors will find parking options and should check with reception in the main lobby to reach specific offices or destinations.

In 1997 Walton Capital re-measured the tower and found 36,000 square feet more rentable area than recorded before, then re-leased the space at higher rates. The U.S. Geological Survey lists it among 39 San Francisco high rises with a flawed welding technique that may leave them vulnerable in a large earthquake.