Black Brook (Seneca River tributary)

US Post Office-Waterloo is a historic post office building located at Waterloo in Seneca County, New York. It was designed and built in 1924 and is one of a number of post offices in New York State designed by the Office of the Supervising Architect of the Treasury Department, James A. Wetmore. It is a symmetrically massed, one story brick building executed in the Colonial Revival style. The roof is surmounted by a wooden cornice and brick parapet. It was listed on the National Register of Historic Places in 1989.

William H. Burton House, also known as the National Memorial Day Museum, is a historic home located at Waterloo in Seneca County, New York. It consists of a 2+1⁄2-story, three-bay offset front entrance main block with two rear wings. The original 1830s Federal-style residence was modified to its present Italianate style in about 1870 and features a hipped roof and cupola. In 1965, the building was purchased by the Waterloo Library and Historical Society to house collections and memorabilia related to the birth of Memorial Day in Waterloo in 1866. It was listed on the National Register of Historic Places in 1996.

First Presbyterian Church is a historic Presbyterian church located at Waterloo in Seneca County, New York. It was constructed in 1850 and is a monumental brick Romanesque Revival, 104-by-65-foot (32 by 20 m) edifice. The facade features a large rose window and two soaring, square, 90-foot-tall (27 m) corner towers with octagonal spires. A small 1+1⁄2-story chapel was added to the east elevation of the church in 1880–1881. It was listed on the National Register of Historic Places in 1996.

M'Clintock House, also known as the Baptist Parsonage, is a historic home located at Waterloo in Seneca County, New York. It is a two-story, Federal style brick dwelling built in 1833–1836. The home is notable as the residence of Quaker pharmacist Thomas M'Clintock and his wife Mary Ann from 1836 to 1856. In July 16, 1848, the home was the location where the Declaration of Sentiments and other resolutions and speeches were drawn up for the subsequent First Women's Rights Convention. It was listed on the National Register of Historic Places in 1980. The house is one of the sites of the Women's Rights National Historical Park. The restored mid-19th century home is open for tours in summer.

Waterloo Library, also known as the Waterloo Library and Historical Society, is a historic library building located at Waterloo in Seneca County, New York. The second story of the two-story frame structure contains a small theater. It was built in 1883 in the Queen Anne style and is sheathed in brick. The structure is composed of a two-story main block with a three-story projecting pavilion and one-story intersecting gable wing. It features a number of distinctive Victorian era features such as steeply pitched and intersecting gable roofs; stone elements such as lintels, belt courses, sills, and chimney abutments and caps; and terra cotta wall surfaces and ridge blocks. It was listed on the National Register of Historic Places in 1996.

Waterloo is a village and primary county seat of Seneca County, New York, United States. The population was 5,171 at the 2010 census and is now the most populated village in Seneca County. The village is named after Waterloo, Belgium, where Napoleon was defeated. It is the primary county seat of Seneca County, with the other being Ovid as part of a two-shire system established in 1822. Most of the county administrative offices are located in the village. Therefore, many political sources only list Waterloo as the county seat. The Village of Waterloo is mostly in the Town of Waterloo, but the part south of the Cayuga-Seneca Canal of the village is in the Town of Fayette and a small area in the southeast of the village is in Town of Seneca Falls. Waterloo is east of Geneva and is located in between the two main Finger Lakes, Seneca Lake and Cayuga Lake.

Saint Paul's Church is a historic Episcopal church located at Waterloo in Seneca County, New York. It was constructed in 1863-1864 and is a masonry church built of local limestone in the Gothic Revival style. The 52 feet by 72 feet church features a tower with a stone spire and clock. A large two story rough cut limestone parish house was built in 1916. After 1856 the church built St. John's Chapel on Chapel Street in Waterloo. The land was purchased by Jane Hunt, a Quaker known for support of women's rights. It was listed on the National Register of Historic Places in 1997.

Waterloo United Methodist Church is a historic United Methodist church located at Waterloo in Seneca County, New York. It was constructed in 1895 and is a brick and stone church with vernacular Romanesque / Greek Revival style design and decorative detail. It features an 85-foot (26 m) tripartite tower, crowned by a tall steeple. It was listed on the National Register of Historic Places in 2004.

James Russell Webster House is a historic home located at Waterloo in Seneca County, New York. It is a temple front Greek Revival style residence. When built in 1850-1855 it featured a two-story, three-bay, side hall main block flanked by two symmetrical one story, three-bay center hall wings. In the 1870s, a veneer of Italianate details were added during and expansion and modernization. The expansion included adding a second story to each side wing. The front facade features a pedimented portico supported by four Doric order columns. It was listed on the National Register of Historic Places in 2007.

Waterloo High School is a public high school located in Waterloo, New York, United States. As of 2021, it has an enrollment of 471 students from grades 9–12. Waterloo High School is ranked 816th within New York. Students have the opportunity to take Advanced Placement® coursework and exams. The AP® participation rate at Waterloo High School is 19%. The total minority enrollment is 12%, and 57% of students are economically disadvantaged. The current principal is James Karcz and the assistant principals are Tabitha Morris and Katherine Tucker.

Maple Grove Speedway was a red clay surfaced, one-half mile egg-shaped oval raceway located in the Finger Lakes Region of New York State.

Waterloo is a town in Seneca County, New York, United States. The population was 7,378 at the 2020 census. The town and its major community are named after Waterloo, Belgium, where Napoleon was defeated. There is also a village called Waterloo, the primary county seat of Seneca County. The Town of Waterloo is situated on the western border of the county, east of Geneva.