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.Nob Hill is a luxury destination in San Francisco, owing to its numerous Michelin-starred restaurants, boutiques, cultural institutions, art galleries, and historic landmarks. The neighborhood is named after one of San Francisco's original "Seven Hills".