Old Salem Church and Cemetery

Old Catonsville High School, also known as St. Mark's School, is a historic school building located at Catonsville, Baltimore County, Maryland. It is a masonry schoolhouse which consists of a one-story, single bay structure (built in 1878) and a three-story, four bay addition (built in 1898). In 1885 the school was designated a high school and in 1910 the property was sold to the Catholic Church.It was listed on the National Register of Historic Places in 1987.

Castle Thunder was a house constructed on Frederick Road in 1787. It belonged to Charles Carroll of Carrollton, the last surviving signer of the United States Declaration of Independence. Carroll gave the home to his daughter, Mary Carroll, and her husband, Richard Caton, after they got married at Annapolis on November 25, 1787. The home stood from 1787 to 1907. The house was used as an inn for travelers. Prior to the American Civil War, a private school was conducted at the house by Carrie Coale and her daughter. In 1907, the house was bought by former Maryland senator John Hubner and torn down to make room for the residence of Arthur C. Montell, a cashier of the First National Bank of Catonsville.The Catonsville branch of the Baltimore County Public Library was later built at the house's location, which currently stands.A commemorative plaque was built at the house's location in front of the library in 1966. The plaque went missing in July 2018 and was found, damaged, by the Maryland State Highway Administration. Repairs for the sign were estimated to be $350.

Catonsville () is a census-designated place (CDP) in Baltimore County, Maryland. The population was 44,701 at the 2020 US Census. The community is a streetcar suburb of Baltimore along the city's western border. The town is known for its proximity to the Patapsco River and Patapsco Valley State Park, making it a regional mountain biking hub. The town is also notable as a local hotbed of music, earning it the official nickname of "Music City, Maryland." Catonsville contains the majority of the University of Maryland, Baltimore County (UMBC), a major public research university with close to 14,000 students.

Central Catonsville and Summit Park Historic District is a national historic district in Catonsville, Baltimore County, Maryland, United States. It is entirely residential and consists generally of rectangular lots, the largest lots being found on Frederick Road and Newburg Avenue. These contain the earliest dwellings. The earliest, and the largest house in the district is the Gary Mansion, known as The Summit, built in the 1850s as a summer house in Second Empire style. The Summit Park subdivision takes its name from this house, and surrounds it on all sides. Structures in the district date from 1869 and extends to 1958, by which date the neighborhood had substantially achieved its present form and appearance.It was added to the National Register of Historic Places in 2006.

Summit is a historic home located in Catonsville, Baltimore County, Maryland. It a large brick house, once part of a country estate owned by James Albert Gary. It features a three-story Italianate tower and large wing extending to the rear. The main façade is three stories and five bays wide, with the tower located on the east side. A one-story porch with square columns and railings runs across the full façade. The mansion was built originally as a summer home and later converted to apartments after its sale to the Summit Park Company in 1919.It was listed on the National Register of Historic Places in 1979.

Old Catonsville Historic District is a national historic district in Catonsville, Baltimore County, Maryland, United States. It was laid out with the construction of the electric railway and is overwhelmingly residential, with three churches (one with a school), a modern public library, and an Art Deco water tower. Architectural styles in the district range from mid- to late-19th century vernacular "I-houses" to late-19th and early-20th century styles such as Queen Anne, Bungalow, Colonial Revival, Dutch Colonial, Tudor Revival, and Craftsman. A large number of these dwellings have freestanding garages, typically finished in a like manner to their houses.It was added to the National Register of Historic Places in 2002.

Winters Lane Historic District is a national historic district at Catonsville, Baltimore County, Maryland, United States. It is a historically African-American residential community which developed between 1867 and the mid-1940s. Winters Lane is located between Frederick Road and the Baltimore National Pike. It is composed mainly of single-family dwellings augmented by a few commercial, social, or religious resources. The district contains 155 properties, including 141 residential properties, two former schools, three commercial buildings, three social clubs, and five churches or church-related buildings.It was added to the National Register of Historic Places in 2007.

Catonsville High School (CHS) is a four-year public high school in Catonsville, Maryland. It is located on the southwest side of Baltimore County, Maryland, close to the Baltimore border near Anne Arundel and Howard County, just outside the Baltimore Beltway.

Spring Grove Hospital Center, formerly known as Spring Grove State Hospital, is a psychiatric hospital located in the Baltimore, Maryland, suburb of Catonsville. Founded in 1797 as a general medical and psychiatric retreat, Spring Grove Mental Hospital is the second oldest continuously operating psychiatric hospital in the United States. Today, the hospital operates 425 beds and has approximately 800 admissions and discharges a year. Service lines include adult and adolescent acute psychiatric admissions, long term inpatient care, medical-psychiatric hospitalization, forensic evaluation services, inpatient psychiatric research, and assisted living services. The facility is owned and operated by the University of Maryland, Baltimore since May 2022 and is the location of the Maryland Psychiatric Research Center which is renowned for its research into the causes of schizophrenia.

Hilton is a historic home located at The Community College of Baltimore County in Catonsville, Baltimore County, Maryland. It is an early-20th-century Georgian Revival–style mansion created from a stone farmhouse built about 1825, overlooking the Patapsco River valley. The reconstruction was designed by Baltimore architect Edward L. Palmer, Jr. in 1917. The main house is five bays in length, two and a half stories above a high ground floor, with a gambrel roof. The house has a 2+1⁄2-story wing, five bays in length, with a gabled roof, extending from the east end; and a two-story, one-bay west wing. The roof is covered with Vermont slate. The house features a small enclosed porch of the Tuscan order that was probably originally considered a porte cochere.Hilton is situated on the 5000-acre "Taylor's Forest" surveyed in 1678. The first construction at the 511-acre site was a stone farmhouse built between 1818 and 1825 for James W. McCulloh. After defending several charges of conspiracy, the property was sold to John Lewis Buchanan in 1825. In 1827 Dr. Lennox Birckhead, son of McColloh's business partner Soloman Birkhead purchased the property. Birkhead named his home "Hilton" for its high elevation.William Carson Glenn purchased the property in 1837, selling to his politician brother John Glenn in 1842. Guests during this period included Robert E. Lee. In 1852, Glenn added several stone outbuildings. The property passed to Marrietta Glen and was managed by newspaper publisher William Wilkens Glenn. William Glenn managed the farm with 26 slaves, sympathizing with the South during the Civil War. Hilton was used as a stopping location for Southerners fleeing Union troops for home. Glenn died in 1876, with the farm falling into disuse. In 1905 the estate was subdivided into 25 lots. In 1907 43 acres were donated by Russell Sage Foundation director John Mark Glenn (1858–1950) to create the first section of Patapsco Valley State Park. Hilton was purchased in 1917 by National Enameling and Stamping Company owner George Worth Knapp as a summer home and dairy farm reassembling 105 acres of the estate. In 1962 Baltimore County Public Schools purchased the property to establish a Community College of Baltimore County branch. In the 1970s lecture halls occupied the mansion. In 2011, a grant was awarded to renovate the building as the Center for Global Education.In addition to the Hilton Mansion, several other slavery-era outbuildings are on the property: two Tudor style stone houses built in 1852, of which one is in ruins; an 1852 stone bowling alley in ruins; and a stone gardeners building.It was listed on the National Register of Historic Places in 1980.

Ingleside is a historic home that once stood in Catonsville, Maryland.

Mount de Sales Academy is an all-girls secondary school located in Catonsville in unincorporated Baltimore County, Maryland. The school is located near the city of Baltimore and within the Roman Catholic Archdiocese of Baltimore. The school is affiliated with the Roman Catholic Church and is partially staffed by the Dominican Sisters of St. Cecilia. Mount de Sales Academy was founded in 1852 by the Visitation Sisters as a boarding school for girls. Now teaching only girls it now serves as a college-preparatory school. It was the first institution in Baltimore County to offer education to women of all religious denominations.