House at 56 Cornelia Street

Plattsburgh City Hall is an historic government building located at City Hall Place in Plattsburgh, Clinton County, New York. It was designed by architect John Russell Pope and constructed in 1917. It is a three-story, steel frame, limestone clad building in the Classical Revival style. It features a projecting entrance portico with six Doric order columns and a low central dome.: 6–7  It was added to the National Register of Historic Places on December 12, 1973.

Paul Marshall House is a historic home located at Plattsburgh in Clinton County, New York. It was built about 1828 and is a 2+1⁄2-story, stone-and-brick structure on a stone foundation in the Federal style. It features a dressed stone facade and corbelled stone chimneys.It was listed on the National Register of Historic Places in 1982.

The Clinton County Courthouse Complex is a historic county government and courthouse site located at 135 Margaret Street in Plattsburgh, Clinton County, New York. The main courthouse was constructed in 1889. It is a two-story, ashlar stone and brick Richardsonian Romanesque style building. It has a hipped roof and rock-faced arched openings. It features a large, square central tower with an open campanile and pyramidal roof. The associated Surrogate's Building was built in 1884–1885, and is a two-story, Italianate style brick building with a bracketed cornice with Renaissance style detail.The courthouse complex was added to the National Register of Historic Places on November 12, 1982.

First Presbyterian Church is a historic Presbyterian church located at 34 Brinkerhoff Street in Plattsburgh, Clinton County, New York. It was originally built between 1812 and 1816; after a fire destroyed the structure in 1867, it was rebuilt in the same location between 1868 and 1873. It is a rectangular limestone Gothic Revival style church. It has a slate gable roof and buttresses. It features arched openings and a central square bell tower with tall spire and embedded clocks on each side.The congregation officially formed in 1797, after having met since at least 1792. The building was added to the National Register of Historic Places in 1982.

Strand Theater, now called the Strand Center Theatre, is a historic theater located at Plattsburgh in Clinton County, New York. It was built in 1924 as the premier theater in Plattsburgh and designed in the Classical Revival style. It consists of a vestibule, main lobby, mezzanine, auditorium, and stage with supporting spaces. It has seating for 950 people. It was in continuous use as a movie theater until 2005, when it was purchased by the North Country Cultural Center for the Arts (NCCCA) with the goal of restoring it to its historic grandeur. This restoration took 10 years and $4 million to complete. In 2014 the NCCCA changed its legal name to The Strand Center for the Arts which includes this beautiful Strand Center Theatre but also the Federal Building next door which houses administration, gallery space and arts education classes. It was listed on the National Register of Historic Places in 2008.

Kent-Delord House, also known as Kent-Delord House Museum, is a historic home located at Plattsburgh in Clinton County, New York. It was built in 1797 and is reputedly the oldest house in Plattsburgh. It is a two-story, rectangular plan, wood frame dwelling with a gable roof. It features a one-story, pedimented entrance porch and inside end brick chimneys. It is open as a local history museum. It was listed on the National Register of Historic Places in 1971.

St. John the Baptist Roman Catholic Church and Rectory is a historic Roman Catholic church and rectory located at 20 Broad Street in Plattsburgh, Clinton County, New York. Both structures were added to the National Register of Historic Places as one record in 1982.

Brinkerhoff Street Historic District is a national historic district located at Plattsburgh in Clinton County, New York. The residential district includes 13 contributing buildings. The district generally consists of one and one half / two story brick or frame residences built between 1845 and 1890.It was added to the National Register of Historic Places in 1982.

Z. Ritchie House is a historic home located at Plattsburgh in Clinton County, New York. It was built between 1856 and 1869 and is a two-story, frame dwelling on a stone foundation in the Gothic Revival style. It features a cross-gable roof, decorative bargeboards, and a one-story projecting bay with ornate balustrade.It was listed on the National Register of Historic Places in 1982.

D'Youville Academy is a historic school building and nunnery in Plattsburgh in Clinton County, New York. It was built about 1878 and is a 2+1⁄2-story, cruciform plan brick structure on a raised stone foundation. The facade features a rounded 2-story bay, a five-gable roof dormer, and Mansard roof. The Academy was founded about 1878 and operated by the Grey Nuns, founded by Saint Marie-Marguerite d'Youville (1701-1771). The Academy has since been folded into the Seton Catholic Central High School, and the building has since been converted into apartments. It was listed on the National Register of Historic Places in 1982.

W. G. Wilcox House is a historic multiple dwelling located at Plattsburgh in Clinton County, New York. It was built about 1888 and is a two-story, rectangular multiple dwelling structure with a flat roof on a stone foundation. It features elaborate Eastlake detailing.It was listed on the National Register of Historic Places in 1982.

Court Street Historic District is a national historic district located at Plattsburgh in Clinton County, New York. The residential district includes 51 contributing buildings. The district generally consists of large scale Queen Anne or Colonial Revival style residences built in the early 20th century, with some examples of mid-19th century Greek Revival and Italianate style residences.It was added to the National Register of Historic Places in 1982.