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Daniels is a ghost town straddling the Patapsco River east of Woodstock and north of Old Ellicott City in Baltimore and Howard counties, Maryland, United States. It is the location of the Daniels Mill, a site listed on the National Register of Historic Places. Daniels is the home town of former Howard County Executive and State Senator James N. Robey. A postal office operated in the community from 1 March 1943 to 31 August 1971.

Oak Hall is a historic slave plantation home located in Columbia, Howard County, Maryland Oak Hall was built as a sister house to the Waveland Manor built by Richard Dorsey in 1809 on a land grant named New Year's Gift which contained the 1732 Dorsey Family estate Elkhorn. The brick manor house featured 19 rooms and nine fireplaces. Outbuildings included a large frame barn. The manor was located adjacent to Christ Church Guilford. The Dorsey family remained Confederate sympathizers through the civil war, providing more militia than any other family in the state.Oak Hall remained in good condition throughout its history, and was demolished in November 1985 for a commercial land development. Oak Hall Lane in Columbia terminates at the former location of the residence with a small commercial office complex.

Alberton is an unincorporated community in Howard County, Maryland, United States. A postal office operated in the community from 3 February 1854 to 1 March 1943.Alberton was the site of a large cotton mill along the Patapsco River, founded by James S. Gary after moving from Connecticut in 1839. A store and seventy company buildings for workers were built on 820 acres around the factory. The mill used adult and child labor, including Gary's son, James Albert Gary. In 1866 and 1868, the mill was damaged by flooding, which Gary survived by floating with his daughter on a log. In 1870, James Albert Gary inherited the mill and the town named after him, "Alberton". In 1885, his son, E. Stanley Gary took over the mill, which operated 228 looms and 8,000–9,000 spindles.In 1879, the stone Victorian Gary Memorial church was built and in 1893, St. Alban's chapel was built as an Episcopal church for the mill town. In 1938, the mill and town was sold to the C.R. Daniels company and renamed Daniels.

Daniels Mill is a historic mill complex located at Daniels, Howard County, Maryland, in a sheltered, wooded valley of the upper Patapsco River. The complex consists of seven early industrial structures, several concrete block and brick structures of 20th century date, and Gary Memorial United Methodist Church, a granite church built in the High Victorian Gothic style with an off-center tower entrance on the west gable. South of the church is a small cemetery.In the 19th century, an industrial village existed on the site, including stores, a railroad station, a school and several mill workers' houses. The large majority of these supportive structures were demolished in the 1960s. The Elysville Manufacturing Company was incorporated in 1829, by Thomas Ely, to manufacture cotton textiles. The mill was erected between August 1845 and spring 1846. It was acquired by the Oskiska Manufacturing Company which went bankrupt, then by the Alberton Manufacturing Company in 1853, and the mill village was called Alberton at least through the 1870s. The mill was then acquired in the 1860s by James S. Gary, who created still another firm which operated the mill until the 1940s, when the C.R. Daniels Company took control.C.R. Daniels was a New York-based company founded in 1918 that manufactured sail cloth material. The company purchased the 500-acre Daniels mill and 118 houses in 1940 for $65,000, doubling its size by 1950, and eventually over 300,000 sq ft. The company produced a wide variety of canvas products and canvas covers with over 200 sewing machines to assemble patterns. Later specialties included fiberglass components and conveyor belts. In 1965, the mill phased out company housing, tearing down the historic buildings and churches. In 1972, flooding from Hurricane Agnes damaged or destroyed the majority of the buildings and mill site. In 1977 a fire destroyed the remainder of the mill.It was listed on the National Register of Historic Places in 1973.

Elysville is an unincorporated community in Howard County, Maryland, United States. A postal stop operated between February 22, 1834, and February 3, 1854.

Located in the Simpsonville area of Columbia in Howard County, Maryland, United States, Athol Plantation. Reverend James Macgill of Scotland, built the plantation house on lands patented in 1730. The stone house was constructed by masons brought from his homeland stating in 1732, and was completed in 1740. A square cupola and porch were added in the 19th century, and later removed. In 1866 the house was the residence of Richard Gambrill MacGill. From 1927 to 1946 the Melvin Coar family occupied the house.

Linnwood, is a historic home located at Ellicott City, Howard County, Maryland, United States. It is a large 1901 Queen Anne-influenced house consisting of a 2+1⁄2-story four-bay by four-bay frame structure with vinyl siding, a rubble stone foundation, and a hip roof with asphalt shingles. Six domestic outbuildings are arrayed behind the house, including a springhouse/greenhouse, shop building/cold storage and annex, garage, smokehouse, privy, and a modern garage. A stone gateway with iron gates is located at the road, flanking the driveway. The house's Late Victorian form and appearance resulted from a thorough remodeling in 1901 of a preexisting farmhouse, according to designs by architect D. S. Hopkins.Linnwood was listed on the National Register of Historic Places in 2006.

Mt. Hebron High School is a public high school located in Ellicott City, Maryland, United States. It is part of the Howard County Public School System.

St. John's Episcopal Church is located in Ellicott City in Howard County, Maryland, United States. The church stands on a land grant originally patented as "Three Brothers". A section of the land owned by Caleb Dorsey was donated for the church. The building was erected out of local granite in 1823. The church was designed by architect Norris G. Starkweather, who also designed White Hall, Temora, and First Presbyterian Church and Manse. Dr. Charles Worthington Dorsey and George Howard oversaw the construction. The rectory was built in 1940.

The Brick House on the Pike, Elerslie, Three Brothers is a historic home located at Ellicott City, Howard County, Maryland, United States. It is a large two-story, side-passage, double-pile plan house constructed in two phases, a brick structure built by Caleb Dorsey replacing a wooden structure when he bought the property at the end of the 18th century, and the larger more formal section built by his son Charles Worthington Dorsey about 1817. Also on the property and contemporary with the main house are an ice house foundation, a stone stable or carriage house and three board-and-batten outbuildings dating from the late 19th or early 20th century. The early Federal features of the house were left essentially untouched in the alterations that took place about 1907, and have remained intact. Edward Hammond undertook this modernization after being given the house as a wedding present by the father of his wife, Reubena Rogers. Electricity, central heat, and a capacious front porch were added, and the roof of the older section of the house was raised, creating a full second floor with dormer windows. Public water, sewer, gas, and modernization of utilities were accomplished between 1995 and 2009 by Dr Edward Rogers, a direct descendant of Caleb Dorsey. The previous owners, the Lassotovitch, Hammond, Ligon, and Dorsey families are all related. Governor Thomas Watkins Ligon (1810–1881) of Maryland lived in the house, having married a Dorsey, before they moved to White Hall, nearby.The Brick House on the Pike was listed on the National Register of Historic Places in 1996.

Linwood is an unincorporated community in Howard County, Maryland, United States.

The Howard County Police Department (HCPD) is the primary law enforcement agency servicing 330,558 (20202) persons within the 254 square miles (660 km2) of Howard County, Maryland.