Waterville Opera House and City Hall

The Waterville Main Street Historic District encompasses the best-preserved portions of the historical commercial downtown area of Waterville, Maine. Developed most intensively in the late 19th and early 20th centuries, this area was the center of commerce for Waterville and the surrounding rural communities. It encompasses 25 properties on Main and Common Streets, including the Waterville Opera House and City Hall. It was listed on the National Register of Historic Places in 2012, and was slightly enlarged in 2016.

The Professional Building is a historic commercial building at 177-179 Main Street in Waterville, Maine. Built in 1923 to a design by Miller & Mayo of Portland, it is a rare early example of Art Deco architecture in the state. It was listed on the National Register of Historic Places in 1982.

The Alvin O. Lombard House is a historic house at 65 Elm Street in Waterville, Maine. Built in 1908, it is a distinctive local example of late Shingle style architecture. It is further notable as the home of inventor Alvin O. Lombard, who developed the Lombard Steam Log Hauler, an early commercial use of track-propelled vehicles. The house was listed on the National Register of Historic Places in 1982.

The Waterville Public Library is the public library serving Waterville, Maine.

The Old Waterville Post Office is a historic post office facility at 1 Post Office Square in central Waterville, Maine. Built in 1911, it is a fine local example of institutional Greek Revival architecture. It was listed on the National Register of Historic Places in 1977, and presently houses a restaurant and brewpub.

The Lockwood Mill Historic District encompasses the only major 19th-century mill complex in Waterville, Maine. Located south of the city's downtown, it was designed by (and named for) Amos D. Lockwood, a nationally known industrial designer of the period. Its #2 building was for 45 years home to the Hathaway Shirt Company. It was listed on the National Register of Historic Places in 2007.

The Ticonic Footbridge, popularly known as the Two Cent Bridge or the Two Penny Bridge, is a suspension bridge that spans the Kennebec River between the city of Waterville and the town of Winslow in Kennebec County, Maine. It is one of the oldest surviving wire-cable steel suspension bridges and also is considered to be the last known extant toll footbridge in the United States.

The First Baptist Church is a historic church at 1 Park Street (corner of Elm) in Waterville, Maine. Built in 1826, it is the city's oldest standing public building. It was renovated in 1875 to a design by Francis H. Fassett. It was listed on the National Register of Historic Places in 1976.

The Foster-Redington House is a historic house at 8 Park Place in Waterville, Maine. Built in 1883, it is a fine example of Queen Anne architecture, supposedly the city's first example of the style. It was built by Moses Coburn Foster, a well-known builder in the state, as his private residence. Moses owned M.C. Foster & Son, general contractors and builders. An advertisement for the business lists its location as 7 Park Place, which was the home built for his son, Herbert Foster. Herbert died at 38 years old. Herbert's home is as unique as Moses' but has not been restored, but instead, turned into two apartments. Moses was born in Newry in 1827. His father, Benjamin Foster, was a Methodist minister for fifty years. His mother was Lovisa Coburn of Tyngsboro, Massachusetts. Moses married in 1849 Francina Smith of Bethel, Maine. Foster built the Grand Trunk Railroad at Island Pond; the Calvary Baptist Church in Washington, D.C.; the addition of the Maine State House; post-offices at Houlton, Skowhegan, and Bangor; the East Maine Insane Asylum and Maine Central Station at Brunswick; and many churches (Bethel, Andover, Rumford and Houlton). (American Series of Popular Biographies, pages 274–276). 8 Park Place became the home to Carrie Foster Redington, daughter of Moses and teacher before her marriage at the Mill Street Primary School (according to the 1887 Waterville Directory), and her husband, Frank Redington, a businessman, city mayor and civic leader. It was listed on the National Register of Historic Places in 2014 after nomination by its current owner, Nancy J. Williams, a native of Savannah, Georgia. Nancy purchased the house July 2, 2012 while still working as the executive director of Lake George Land Conservancy in Bolton Landing, NY. She moved to the house from Queensbury, NY, around January 2016. Major projects completed by Nancy included shingling the roof, removal of knob and tube wiring, replacement with modern wiring, restoration of the front porch's steps and upper spindles, restoration of the master bedroom's ceiling, and restoration of rooms to their original condition of between 1883 and 1910. Bruce and Amy Bernard, the previous owners, had replaced rotting shingles on the lower level with accurate copies, rebuilt a rear chimney and remodeled the kitchen and bathrooms.

The Redington Museum or Redington House is a historic house and museum in Waterville, Maine that is listed on the National Register of Historic Places. The museum is the headquarters of the Waterville Historical Society. Built in 1814, it is one of the best-preserved houses of the period in the city. It has served since 1924 as the museum and headquarters of the Waterville Historical Society, and was listed on the National Register of Historic Places in 1978.The museum is listed on the official website of the Maine Office of Tourism.

The Universalist Unitarian Church is a historic church on Silver Street and Elm Street in Waterville, Maine in the United States. Built in 1832 for a Universalist congregation founded in 1826, it is a prominent local example of transitional Federal-Gothic Revival architecture. It was listed on the National Register of Historic Places in 1978.

The Heald House is a historic house at 19 West Street in Waterville, Maine. Built in 1916 to a design by Herbert E. Knapp, it is the city's only substantial example of Prairie School architecture. It was listed on the National Register of Historic Places in 2005.