Masonic Temple Lodge No. 420

125 S. Fourth St. is the address of an unnamed historic building in the Ogle County, Illinois city of Oregon. The building is part of the Oregon Commercial Historic District and as such is part of the National Register of Historic Places. The district and its contributing properties were added to the Register in August 2006. The building has been altered somewhat from its original appearance including wood siding added to the first floor level and the addition of signage. It stands near the rest of the 100 Block of South Fourth Street, which includes other historic buildings at 127 S. Fourth St., 121-123 S. Fourth St., to which 125 is adjacent and the Masonic Temple Lodge No. 420.

The Oregon Commercial Historic District is a historic district in Oregon, Illinois, that has been listed on the National Register of Historic Places since 2006. The district is roughly bordered by Jefferson, Franklin, 5th and 3rd Streets in Oregon. It is one of six Oregon sites listed on the National Register and one of three to be so listed since the turn of the 21st century. The other two are the Oregon Public Library, listed in 2003, and the Chana School, listed in 2005.

Oregon ( ORR-ig-on) is a city in and the county seat of Ogle County, Illinois, United States. The population was 3,721 in 2010.

The Soldiers' Monument is a memorial consisting of three statues, one in bronze and two in marble by sculptor Lorado Taft, grouped around an exedra designed by the architectural firm of Pond and Pond. It is located in Oregon, Illinois, the county seat of Ogle County, Illinois. It was dedicated in 1916. The sculpture is part of the Oregon Commercial Historic District. The district was designated and listed on the National Register of Historic Places in August 2006.

Iron Mike is an 1896 cast-iron fountain in the 400 Block of Washington Street in the city of Oregon, Illinois. It is located at the site of the Ogle County Courthouse, at the intersection of Illinois Route 2 and Route 64. Iron Mike is four feet tall and three feet wide, at its widest point. The fountain's lowest tier is a pool for pets and reads "Illinois Humane Society." There is a step for children on the south side of the fountain and on the north, street, side, the largest middle tier was made to be accessible to horses. On the rear side of the horse basin is a "bubbler" for adults, it is also reachable by children via the iron step. The multi-tier fountain was originally set into a concrete base which was immediately adjacent to the curb of Route 64. In 2021 Iron Mike was relocated 15 feet away from the road unto the property of the Ogle County Courthouse.

The Ogle County Courthouse is a National Register of Historic Places listing in the Ogle County, Illinois, county seat of Oregon. The building stands on a public square in the city's downtown commercial district. The current structure was completed in 1891 and was preceded by two other buildings, one of which was destroyed by a group of outlaws. Following the destruction of the courthouse, the county was without a judicial building for a period during the 1840s. The Ogle County Courthouse was designed by Chicago architect George O. Garnsey in the Romanesque Revival style of architecture. The ridged roof is dominated by its wooden cupola which stands out at a distance. In addition to the courthouse building, the public square contains several outbuildings and sites that are also historic in nature and considered contributing properties to the Oregon Commercial Historic District, including a sculpture by Lorado Taft and a cast-iron fountain. The courthouse joined the Register in 1981 and was included as a contributing property to the historic district in 2006. After initially joining the Register the structure underwent a careful restoration. The courthouse no longer serves as the primary judiciary center for the county; its successor is located directly across the street.

The building at 302 Washington St. in Oregon, Illinois is part of trio of historic Italianate commercial buildings within the boundaries of the Oregon Commercial Historic District from 300-306 Washington. The structure acts mostly as a hallway area between the buildings at 300 Washington St. and the F.G. Jones Block. The interior and exterior have been significantly restored on all three buildings. As part of the Commercial Historic District 300 Washington Street was added to the National Register of Historic Places in August 2006.

The Oregon Public Library is located in Oregon, Illinois, United States, the county seat of Ogle County. The building is a public library that was constructed in 1909. Prior to 1909, Oregon's library was housed in different buildings, none of which were designed to house a library. The library was built using a grant from wealthy philanthropist Andrew Carnegie. The grant was obtained after Oregon's citizens voted to change Oregon's library from a city library to a township library. The building was completed by 1908 but the library did not begin operation until 1909. The Oregon Library was designed by Chicago architects Pond and Pond. The Ponds were members of the Eagle's Nest Art Colony, founded by Lorado Taft, and their association with Taft and the colony led them to design the library. Their design was influenced by the colony, and a combination of two architectural styles, Classical Revival and the Arts and Crafts movement. The completed library included a second floor art gallery to which members of Eagle's Nest donated works for a permanent collection. The gallery's collection includes 64 paintings and sculptures as well as a Currier and Ives lithograph collection appraised at US$700,000. The Oregon Public Library was listed on the U.S. National Register of Historic Places in 2003, three years later it was included as a contributing property in a historic district that received the National Register designation.

The Jacobs Block, also known as the National Clothing House, is an 1870s historic building encompassing addresses in the 400 Block of Washington Street and the 100 Block of North Fourth Street in Oregon, Illinois. The Jacobs Block is part of Ogle County's only nationally designated historic district. The area, known as the Oregon Commercial Historic District, was added to the National Register of Historic Places in August 2006. The building, listed as a contributing structure to the historic district, is the Oregon Historic District's largest.

The Unity Building, in Oregon, Illinois, is a historic building in that city's Oregon Commercial Historic District. As part of the district the Oregon Unity Building has been listed on the National Register of Historic Places, along with the rest of the district, since August 2006.

The T. Goings Building is a late 19th-century commercial building within the boundaries of the Oregon Commercial Historic District in Oregon, Illinois, U.S.A. The building is listed as a contributing structure to the overall integrity of the historic district, which was added to the National Register of Historic Places in 2006. The building, found on Oregon's North Fourth Street, is an 1895 example of commercial Italianate style, albeit more muted than the other Italianate buildings in the district.

The Oregon State Savings Bank Building is an historic building in the Ogle County, Illinois city of Oregon. Its location is within the boundaries of the Oregon Commercial Historic District. The historic district was designated and added to the National Register of Historic Places in August 2006.