Allentown, Pennsylvania, established in 1762, the third-largest city in Pennsylvania and largest city in the Lehigh Valley region of eastern Pennsylvania.

Allentown is one of the oldest major cities in the United States with deep roots in the nation's history. The city was the hiding place of the Liberty Bell for nine months during the American Revolutionary War, and the city's oldest cemetery includes the gravesites of American patriots who served in the Continental Army, Union Army, and later wars.

The following 18 places in Allentown have been named to National Register of Historic Places:

Locations National Register of Historic Places

Albertus L. Meyers Bridge (1913) Added 1988 - NRHP #88000870 Corner of 8th and Union Streets Map location: Large concrete multi-arch bridge first opened as a toll bridge in November 1913 by the Lehigh Valley Transit Company as a streetcar and interurban trolley bridge. Construction began in 1911, and when opened, it was the longest and highest reinforced concrete arch bridge in the world. Automobile traffic was charged a toll to cross the bridge until the mid 1950s. Commonly called the 8th Street Bridge, its current name honors the long-time Allentown Band director, Albertus ("Bert") L. Meyers, who played in the band at the bridge's opening.Whelan, Frank (June 8, 2005). "Bridge named after musician ** Albertus L. Meyers also was conductor of Allentown Band.". The Morning Call. pp. B.07.

Allentown Masonic Temple (1925) Added 2004, NRHP: #04000402 1524 W. Linden Street Map location: Historic Masonic Temple built between 1923 and 1925. Built in Neoclassical style, it features elaborate stone and terra cotta trim and four large and imposing fluted composite columns at its main entrance.

Allentown National Bank (1905) Also known as: Meridian Bank Added 2005 - NRHP: #05001490 13–17 N. 7th Street Map location: Historic bank building built in 1905, it is a large eight-story, steel frame and masonry-clad building in the Beaux-Arts style. The bank was first chartered in 1855 by the Commonwealth as the Allentown Bank with a capitalization of $100,000. It was the first bank in Allentown, and was renamed Allentown National Bank in 1866 when it received its federal charter. The building was vacated in the 1990s; however, in the early 2000s, it was re-developed into apartments for independent living senior citizens.

Americus Hotel (1926) Added 1984 - NRHP: #84003454 541 W. Hamilton Street Map location: Classic 1920s Jazz Age hotel built by a group of Allentown businessmen who wanted a first-class hotel in the central business district. It was not to be a palatial private "pleasure dome" like those of the 19th-century robber barons. Rather, it would be a hotel, a public facility that provided the best that world-class service and up-to-date technology could offer. A world class buffet was featured in its restaurant which was considered a must do for Mother's Day and other special occasions.Allentown, 1762–1987, a 225 Year History, Volume II, 1921–1987, Lehigh County Historical Society, 1987.

Bogert Covered Bridge (1841) Added 1980 - NRHP: #80003552 South of Allentown on LR 39016, Little Lehigh Park, Allentown Map location: Historic wooden covered bridge located at Allentown, Lehigh County, Pennsylvania. It is a , Burr Truss bridge, constructed in 1841. It has vertical plank siding and a gable roof. It was restored by the Allentown Parks Department.

Dime Savings and Trust Company (1925) Also known as First Valley Bank Added 1985 - NRHP: #85000036 12 N. 7th Street Map location: Historic bank building built in 1925, and is a T-shaped, five-story red brick building. The base is sheathed in limestone, and the distinctive brick and limestone attic level is reflective of the Art Deco style. The Dime Bank failed in 1932 and over the years the building has been largely vacant. The building was re-constructed and restored as part of the PPL Center project, and was incorporated into the project. The Dime Bank Building is used as the lobby for the 200-room Marriott Renaissance Hotel that is attached to the arena. Its two-story foyer, once the main banking area, houses the front desk and upper floors and includes offices and meeting space for the arena operators.

Dorneyville Crossroad Settlement (1756) Also known as King George Inn, John Dorney House, William Dorney House Added 1977 - NRHP: #77001172 3141 Hamilton Boulevard Map location: Built in 1756 around the time of the French and Indian War. It was originally opened as Dorney's Tavern and was one of four structures the Dorney family built at the crossroads of the Buffalo Trail: Cedar Crest Boulevard and south to Kings Highway, and the Lancaster, Reading, and Allentown roads, Hamilton Boulevard/U.S. Route 222. The inn offered a place to sleep for those traveling to Easton, Reading, Philadelphia, and the Allegheny Mountains. It also served as the community center, used as a town hall, meeting house, courthouse, early church, and a news center.

During the Revolutionary War, Washington's Continental Army troops camped in the fields behind the building, while the officers probably stayed in the inn. The area where the soldiers performed their drills was located in a field behind the building. Peter Dorney owned the original hotel, which remained in the family until 1871. Over the last century, it was owned by Stanley E. Downing who ran it as the Dorneyville Hotel from 1930 until his death in 1962. Downing's wife, Grace, took over and ran it as the White Horse Inn. At the time, a large white wooden horse stood in a corral out front. In November 1970, Downing sold the business to Cliff McDermott, who renamed it the King George Inn, restored it closely to its original appearance, and had it placed on the National Register of Historic Places. In August 2012, the King George Inn was closed, and its future is undetermined.

Gauff-Roth House (1880) Added 1985 - NRHP: #85001966 427-443 Auburn Street Map location: Historical Victorian architecture home featuring a wraparound porch, third-floor balcony, a polygonal turret, and a hipped roof with multiple gables and dormers. The house was built in 1880 for Mary Craig and Elizabeth Craig Gauff with money inherited from their grandfather. Mary met William Gangewere while the house was being constructed and married him. She lived only a short time in the home or not at all. The home was occupied by the Gauff family in 1880, the Zieglers in 1912 and the Roths in 1930. It was added to the National Register of Historic Places in 1985. The home was completely renovated in the mid-1990s.

Haines Mill (1760) Also known as Haines Mill Museum Added 1985 - NRHP: #85001966 432 W. Walnut Street Map location: Haines Mill is a grist mill that dates back to colonial times. It is an example of the Lehigh Valley’s agricultural heritage, The mill uses water power to grind crop grains into flour. The original mill was built around 1760. The mill was reconstructed in 1909 after a fire gutted the interior of the building and operated until 1956. Today, the mill is owned by Lehigh County and operated by the Lehigh County Historical Society.

High German Evangelical Reformed Church (1762) Also known as Zion Reformed, Zion United Church of Christ Added 1983 - NRHP: #83002259 Liberty Bell Museum 620 W. Hamilton Street Map location: Oldest church in Allentown. In 1777, while the British occupied Philadelphia, this Allentown church was used to hide the Liberty Bell as well as the chimes from Philadelphia's Christ Church. This clandestine act of patriotism prevented the British from melting down these treasures for use as ammunition. In 1838, the church was enlarged and may have incorporated the 1762 structure into the building, inside the walls of the current boiler room. The building was doubled in size in from 1886 to 1888 in the Gothic Revival style, in accordance with the designs of architect Lewis Jacoby. In 2023, the museum was closed, and its artifacts transferred to the Lehigh County Historical Society.

Hotel Sterling (1890) Added 1984 - NRHP: #84003469 343–345 W. Hamilton Street Map location: Victorian era hotel built in the Romanesque Revival style with Queen Anne and Eastlake influences. It is three bays wide, with a gabled parapet at the middle bay. It was constructed beginning in 1889 and completed in 1890. The building is in Allentown's first industrial area and when built was near two railroad depots thus served travelers and industrial workers. When nominated in 1980, the hotel had 33 sleeping rooms. Today, the hotel is used as a nightclub. The bar spans two levels, one of which includes a large dance floor, and spills onto a covered deck off of the second floor.

Lehigh Canal: Allentown to Hopeville section (1829) Added 1979 - NRHP: #79002307 East banks of the Lehigh River Map location: The Lehigh Canal changed the character of Allentown and the Lehigh Valley from an agricultural area to an industrial one in 1829. The Canal was first used to bring anthracite coal down from Mach Chunk (now Jim Thorpe) to Easton, where it went south to Philadelphia on the Delaware River. The railroads reached Allentown in the 1850s, and became direct competitors with the canal. By the American Civil War, the economic use of Lehigh Canal ended.

Lehigh County Prison (1869) Added 1998 - NRHP: #81000549 N. 4th and W. Linden Streets Map location: Construction of the prison in 1867 The Civil War era facility held 40 cells, each designed to hold one man. The fortress itself featured walls 45 feet high. Spartan-like cells contained a bed, a sink, a table and a stool. It was on the cutting edge of 19th Century criminal justice practices. The prison was the site of a number of executions, the first in 1894 when Harry Johnson was hanged for the murder of his 4-year-old daughter. The last execution took place in 1910 when George Schaffer was hanged for the axe murder of a Philadelphia traveling salesman

Time and spiraling crime rates pressed the county into building additions to the original structure. one in 1908 and another in 1981. Those efforts, however, proved ineffective in the long run and by 1986, the prison was well worn from use and over-crowdedness. Inmates filed a lawsuit in Federal Court claiming conditions in the old prison violated their Constitutional rights. The legal battle that ensued lasted nearly four years before the County and inmates entered into a consent decree. That settlement mandated construction of a new prison which finally opened its doors for business in May 1992.

Neuweiler Brewery (1911) Added 1980 - NRHP: #80003554 401 N. Front Street Map location: Historic brewery complex located at Allentown, Lehigh County, Pennsylvania. The complex was built between 1911 and 1913, and consists of the office building, brew house, stock house, pump house, wash house, chemistry lab building, boiler room, bottling house, garage, fermenting cellar, and smokestack with the name "Neuweiler" on it. The office building is a two-story, brick and granite building. The remaining buildings in the complex are built of brick. The brew house stands six-stories, and has a copper hipped roof with cupola. The stock house is a long, narrow four-story building. The brewery closed in 1968, and the property is currently in a derelict condition. Many proposals have been made to redevelop the property, the last in 2013 now under review by the Allentown Planning Commission.

Nonnemaker House () Also known as Thomas Mewhorter House Added 1973 - NRHP: #73002281 301 S. Lehigh Street Map location: