The Old Faithful Historic District in Yellowstone National Park comprises the built-up portion of the Upper Geyser Basin surrounding the Old Faithful Inn and Old Faithful Geyser. It includes the Old Faithful Inn, designed by Robert Reamer and itself a National Historic Landmark, the upper and lower Hamilton's Stores, the Old Faithful Lodge, designed by Gilbert Stanley Underwood, the Old Faithful Snow Lodge, and a variety of supporting buildings. The Old Faithful Historic District itself lies on the 140-mile Grand Loop Road Historic District.
A notable missing portion of the district is the Old Faithful Museum of Thermal Activity, which formed part of the trailside museum group that includes the Madison Museum, Norris Museum and Fishing Bridge Museum, all listed as National Historic Landmarks. The Old Faithful Museum was torn down in 1971 to make way for the Mission 66 visitor center, which in turn has been replaced by the Old Faithful Visitor Education Center.