The Fairmont San Francisco is a luxury hotel at 950 Mason Street, atop Nob Hill in San Francisco, California. The hotel was named after mining magnate and U.S. Senator James Graham Fair (1831–94), by his daughters, Theresa Fair Oelrichs and Virginia Fair Vanderbilt, who built the hotel in his honor. The hotel was the vanguard of the Fairmont Hotels and Resorts chain. The group is now owned by Fairmont Raffles Hotels International, but all the original Fairmont hotels still keep their names.

Nob Hill is a neighborhood of San Francisco, California, United States that is known for its numerous luxury hotels and historic mansions. Nob Hill has historically served as a center of San Francisco's upper class. Nob Hill is among the highest-income neighborhoods in the United States, as well as one of the most desirable and expensive real estate markets in the country. Prior to Covid-19, it was the most expensive real estate market per metre squared, narrowly beating Monte Carlo, although it has since fallen heavily. It was the only place in the United States so far where market price per square metre exceeded the average yearly salary in the country.