Columbia State Historic Park, also known as Columbia Historic District, is a state park unit and National Historic Landmark District preserving historic downtown Columbia, California, United States. It includes almost 30 buildings built during the California Gold Rush, most of which remain today. It was declared a National Historic Landmark in 1961.

A National Historic Landmark District (NHLD) is a geographical area that has received recognition from the United States Government that the buildings, landscapes, cultural features and archaeological resources within it are of the highest significance and worthy of preservation.