William Overholser was an American architect known for his contributions to the design of residential buildings in the early 20th century. He was particularly active in the California region, where his work reflected the popular architectural styles of the time, including Craftsman and Mission Revival. Overholser's designs often emphasized the use of natural materials and integration with the surrounding landscape. His work has been recognized for its craftsmanship and attention to detail, making him a notable figure in the history of American architecture.