The Rumford Commercial Historic District located in the town of Rumford, Oxford County, Maine, is significant under National Register Criterion C in the areas of Community Planning and Development and Architecture. It is one of the few planned company towns in Maine. The Rumford Commercial Historic District is also significant under National Register Criterion A in the area of Commerce. As the most intact remaining section of the historically dense commercial downtown in Rumford, the district illustrates a common pattern of retail and commercial uses in first floor spaces with office, fraternal, hotel, or residential spaces above in the taller buildings. The 33 buildings comprise a visually cohesive grouping of commercial, governmental, and institutional buildings built between 1892 and 1967, which generally retain a high degree of historic integrity. Architect designed buildings demonstrate the influence of Italianate, Romanesque Revival, Beaux Arts, and Colonial Revival styles, with examples of the Art Deco style as well. The period of significance for the architecture, 1892-1967, represents the earliest built date for a contributing resource within the district and extending to fifty years before the present.