Dr. Robert B. McNutt House

The Mercer County Courthouse in Princeton, West Virginia was built in 1930–31 in the Art Moderne style. Designed by Alex B. Mahood, it is the most significant example of the style in southern West Virginia. Friezes above the front and rear doors were designed by Mrs. S.L. Mahood, the mother of the architect.It was listed on the National Register of Historic Places in 1980.The Mercer County Courthouse sits in a traffic circle bordered by Main Street on the north side, Scott Street on the west side, Princeton Avenue on the south side, and Alvis Street on the east side. Although designed and built with entrances on all four sides, due to the security issues of today, the public can only enter through the north door.

The Battle of Princeton Court House was fought May 15–17, 1862 in Mercer County, Virginia (now West Virginia) in conjunction with Stonewall Jackson's Valley Campaign. It was a minor victory for the Confederate States Army.

Dr. James W. Hale House, also known as the Hale-Pendleton House, "Temple Knob," and "Temple Hill," was a historic home located at Princeton, Mercer County, West Virginia. Built about 1885, it was a large, two-story plus basement brick house. The house had many Gothic Revival features, such as pointed-arch windows with panes divided by simple geometric tracery, gingerbread bargeboards, and a large verandah completely around the west and south elevations. The verandah roof was supported by more than 12 fluted columns and a cornice with dentil molding in the Greek Revival style. The house sat atop Temple Knob, a small rise said to have been used as a signal point by both Union and Confederate soldiers during the American Civil War.It was listed on the National Register of Historic Places in 1976.

Princeton is a city in and the county seat of Mercer County, West Virginia, United States. The population was 5,872 at the 2020 census. It is part of the Bluefield micropolitan area. The city hosts the Princeton WhistlePigs baseball club of the Appalachian League.

Princeton Senior High School is located in Princeton, West Virginia and is the largest high school in Mercer County. The school is located at 1321 Stafford Drive in Princeton.

H.P. Hunnicutt Field is a stadium in Princeton, West Virginia. It is primarily used for baseball, and was the home field of the Princeton WhistlePigs in the summer collegiate Appalachian League until 2023, when the team ceased operations. It is also home to the teams of Princeton Middle School and Princeton High School, located adjacent to the high school football field. Built in 1988, it was developed by the H.P. and Anne S. Hunnicutt Foundation, and it holds 1,700. The stadium was updated in 1999 from wooden bleachers and press boxes to a modernized stadium featuring wrap around bleacher seating down each foul line and box seats behind home plate. Also added were home and visitor locker areas, coach's offices, and training rooms. More recently, a new batting tunnel was constructed near the main gate of the stadium which can accommodate practices in inclement weather.

Mercer Street Historic District is a national historic district located at Princeton, Mercer County, West Virginia. The district includes 28 contributing buildings in the central business district of Princeton. The buildings are primarily two and three-story, masonry commercial buildings with storefronts on the first floor and housing in the upper stories. Almost all of the buildings date from the opening of the Virginian Railway in 1908 and 1909. Notable buildings include the Old Stag Clothing Store, Mercer County Schools Warehouse (c. 1930), Cleaners and Laundry Building (c. 1915), Sively Company Building (1913), Mullins Brothers Building (1912), and D&D Saddle and Tack Building (c. 1915).It was listed on the National Register of Historic Places in 2003.

Virginian Railway Yard Historic District is a national historic district located at Princeton, Mercer County, West Virginia. The district includes 14 contributing buildings, 1 contributing site, and 1 contributing structure related to the Virginian Railway property at Princeton. Many date to the founding of the railway in 1905–1909, with others related to a physical improvements campaign in the 1920s. A number of the buildings are a vernacular interpretation of the Romanesque Revival style. They include the Locomotive Erecting Shop, transfer table pit (c. 1905), machine shop foundations, three water pump houses (c. 1910–1920), North Repair Shop (c. 1925), Brick Storehouse (c. 1940), and Car Wheel Shop (c. 1905).It was listed on the National Register of Historic Places in 2003.

Lilly Grove is an unincorporated community in Mercer County, West Virginia, United States. Lilly Grove is located along West Virginia Route 20, 2 miles (3.2 km) east of Princeton.

Gardner Junction is an unincorporated community in Mercer County, West Virginia, United States. Gardner Junction is 2.5 miles (4.0 km) north-northeast of Princeton.

Johnston Town is an unincorporated community in Mercer County, West Virginia, United States. Johnston Town is located on West Virginia Route 20, 2 miles (3.2 km) east-southeast of Princeton.

Kegley is an unincorporated community in Mercer County, West Virginia, United States. Kegley is located along U.S. Route 19, 2.5 miles (4.0 km) northwest of Princeton. Kegley has a post office with ZIP code 24731.