Question: What characteristics do Lutherville and Baltimore County share? 

Context paragraphs:
Baltimore County Executive: The Baltimore County Executive is the highest elected official representing the government of Baltimore County, Maryland.  The post was established with the implementation of the Home Rule Charter for Baltimore County on December 6, 1956.  Previously the powers of the County Executive were vested with the Board of County Commissioners in Baltimore County, which with the implementation of the Home Rule Charter ceased to exist.  The County Executive is elected to post every 4 years, coinciding with the elections for the county council and governor of Maryland.

Brooklandville, Maryland: Brooklandville is an unincorporated community in Baltimore County, Maryland, United States near where the Jones Falls Expressway meets the Baltimore Beltway.  The general area is a part of Lutherville, and some addresses in the area are considered to be in Lutherville, though Brooklandville has a postal zone and post office of its own (zip code 21022).  Some notable landmarks in the area, including the Park School of Baltimore and St. Paul's Schools are technically within Brooklandville, as noted by their mailing addresses.  However, addresses within the main office complex in the area, Green Spring Station, are considered to be within Lutherville.

Towson High School: Towson High School is a high school in Baltimore County, Maryland, founded in 1873.  The school's current stone structure was built in 1949.  Located in the northern Baltimore suburb of Towson and serving the surrounding communities of Towson, Lutherville, and Ruxton, it is part of the Baltimore County Public Schools system, the 25th largest school system in the nation as of 2005.  Area middle schools that feed into Towson High are Dumbarton Middle School, Ridgely Middle School, and Loch Raven Technical Academy, although students from other areas attend the Law and Public Policy magnet school.  In 2010, Towson was ranked No. 341 in "Newsweek" magazine's "America's Best High Schools: The List" annual national survey.

Lutherville Historic District: Lutherville Historic District is a national historic district at Lutherville, Baltimore County, Maryland, United States.  It is an irregularly shaped urban entity founded in 1852 as a summer resort and suburb of Baltimore City.  Single-family dwellings on large lots characterize the community and most of the structures predate World War I, although ranch-type and "colonial" houses have appeared in the past few decades.

Baltimore County, Maryland: Baltimore County is a county in the U.S. state of Maryland.  It is Maryland's third-most populous county.  Baltimore County is part of the Baltimore metropolitan area and Baltimore-Washington metropolitan area (a combined statistical area).  The county is also part of the Northeast Megalopolis, which stretches from Boston to Washington, D.C. It hosts a diversified economy, with particular emphasis on government, education and health care.

Maryland Route 45: Maryland Route 45 (MD 45) is a state highway in the U.S. state of Maryland.  Known for most of its length as York Road, the state highway runs 30.06 mi from U.S. Route 1 (US 1) in Baltimore north to the Pennsylvania state line in Maryland Line, where the highway continues as SR 3001.  MD 45 is the primary highway between Downtown Baltimore and Towson, the county seat of Baltimore County.  North of Interstate 695, the state highway parallels I-83 and serves the suburban communities of Lutherville, Timonium, Cockeysville, and Hunt Valley.  MD 45 also connects the northern Baltimore County communities of Hereford and Parkton.  The state highway is maintained by the Maryland State Highway Administration in Baltimore County and by the Baltimore City Department of Transportation in the city, where the highway also follows Greenmount Avenue.

Lutherville, Maryland: Lutherville is a census-designated place (CDP) in Baltimore County, Maryland, United States.  As of the 2010 census it had a population of 6,504.  Prior to 2010 the area was part of the Lutherville-Timonium CDP.  Within its borders lies the Lutherville Historic District.

Lutherville-Timonium, Maryland: Lutherville-Timonium was a census-designated place (CDP) in Baltimore County, Maryland, United States, for the 2000 census.  At that time the population was 15,814.  For the 2010 census the area was split into two CDPs, the unincorporated communities of Lutherville and Timonium.  Within its borders lies the Lutherville Historic District.  The Maryland State Fair is held in Timonium each year near Labor Day.

Baltimore County Circuit Courthouses: The Baltimore County Courthouses are located in Towson, the older original Baltimore County Courthouse ("Historic Courthouse") of 1854-1856 (and three additions to eventually form an 'H' shape) houses many of the offices of the County government, of both of the executive branch (county executive and their departments/agencies/boards/commissions, etc.) and the legislative branch (County Council), while the County Courts Building ("new" courthouse to the west separated by a plaza) of 1970-1971 is dedicated to the civil, criminal, family and juvenile divisions of the Circuit Court of Maryland for Baltimore County, as well as the Baltimore County Sheriff's Office with its protection of the Courthouse and its judicial personnel and law enforcement functions.

Baltimore County Sheriff's Office (Maryland): The Baltimore County Sheriff's Office (BCoSO) is the enforcement arm of the Baltimore County, Maryland court and is headquartered in the Baltimore County Courthouse, in the County Seat of Towson, Maryland.  The Baltimore County Sheriff's Office is one of the oldest sheriff's offices in existence in the State of Maryland, dating back to 1659, the traditional year of the County's "erection" (founding).

Supporting paragraphs: Lutherville, Maryland Baltimore County, Maryland
Answer: Maryland, United States