As of the census of 2000, there were 20,193 people, 8,853 households, and 5,046 families residing in the CDP. The population density was 2,100.5 people per square mile (811.3/km²). There were 9,447 housing units at an average density of 982.7/sq mi (379.6/km²). The racial makeup of the CDP was 55.8% White, 36.4% African American, 0.24% Native American, 3.92% Asian, 0.04% Pacific Islander, 1.20% from other races, and 2.36% from two or more races. Hispanic or Latino of any race were 3.20% of the population.
There were 8,853 households out of which 27.7% had children under the age of 18 living with them, 41.6% were married couples living together, 11.6% had a female householder with no husband present, and 43.0% were non-families. 31.9% of all households were made up of individuals and 3.8% had someone living alone who was 65 years of age or older. The average household size was 2.24 and the average family size was 2.87.
In the CDP the population was spread out with 21.3% under the age of 18, 9.8% from 18 to 24, 43.2% from 25 to 44, 18.8% from 45 to 64, and 6.9% who were 65 years of age or older. The median age was 32 years. For every 100 females there were 89.9 males. For every 100 females age 18 and over, there were 86.8 males.
The median income for a household in the CDP was $53,424, and the median income for a family was $61,079. Males had a median income of $41,135 versus $33,359 for females. The per capita income for the CDP was $27,107. About 4.6% of families and 5.9% of the population were below the poverty line, including 6.8% of those under age 18 and 9.2% of those age 65 or over.
Being a Baltimore suburb, many Owings Mills residents drive into the city every day for work, using routes such as the Baltimore Beltway (I-695) and the Northwest Expressway (I-795). The Baltimore Metro Subway has also proven a popular method of transportation. The only station located outside of the Baltimore Beltway is found here in the center of town. There is also public bus service available on Maryland Transit Administration bus route nos. 56, 59, and M-17.
One of the main routes that runs through Owings Mills is Maryland Route 140, better known as Reisterstown Road, which starts in Baltimore City, and changes to Main Street in nearby Reisterstown.
Owings Mills Boulevard, a part of which is Maryland Route 940, is one of the larger roads that runs in Owings Mills, including an interchange with I-795. Currently, it starts at Lyons Mills Road, crosses I-795 and Reisterstown Road and continues to Timber Grove Road where it turns into Glynowings Drive until Bond Avenue, which then it turns into Central Avenue and ends at Butler Road (Route 128).
McDonogh Road is an east-west road that is mostly two lanes and not significantly developed for much of its route. Painters Mill Road is a much larger route that runs north-south between Reisterstown Road and McDonogh Road. Located on Painters Mill Road are the Owings Mills Metro Subway Station and a large number of commercial structures and apartment and housing developments.
Red Run Boulevard is a major commercial roadway that runs mostly parallel and very close to I-795, and is home to several major landmarks and corporations, including the main entrances to the Owings Mills Town Center, the Owings Mills post office, ADP's Baltimore area office, some of T. Rowe Price's Baltimore area offices, and Maryland's only ITT Technical Institute campus.
Red Run Boulevard starts off just south of Painters Mill Road in a cul-de-sac. This area is known as the Owings Mills Corporate Campus, and is the location of several major office buildings. After passing the first traffic light, the road runs past the main entrances to the Owings Mills Mall on a major commercial block which also has a large number of restaurants. After the next major intersection at Owings Mills Boulevard, the road continues 3.1 miles (source: Google maps) until its name changes into Franklin Boulevard at a traffic light. Franklin Boulevard soon has an interchange with I-795.
While the portion of Red Run Boulevard around the mall was built during the 1980s in conjunction with the mall, in 1998 an extension to Franklin Boulevard was opened and was proposed as a new corridor for office buildings in Owings Mills. The first company to have an office on this portion of Red Run Boulevard was ADP. Many other companies have since added properties.
Lyons Mill Road is a road that starts off Painters Mill Road across from the T. Rowe Price complex, and runs a few miles until its end at Liberty Road between Randallstown and Liberty Reservoir. It also intersects with Owings Mills Boulevard (currently the end point of this road). Since the 1990s, the previously rural road has been developed with numerous residential communities.
Lakeside Boulevard is a mostly four-lane road that starts at Painters Mill Road and continues north to its end at Dolfield Road. Lakeside Boulevard is the main road serving Owings Mills New Town. The road is lined with the entrances to several apartment complexes and a few large shopping centers. New Town High School and Elementary School are also located along Lakeside Boulevard.
Dolfield Road is one of the most modified roads in the history of Owings Mills. There are currently two sections of Dolfield Road, one that is simply known as "Dolfield Road" that runs from Deer Park Road in Randallstown to a 3-way intersection with Church Road and Pleasant Hill Road after an overpass over Interstate 795, and another known as "South Dolfield Road" that runs from Painters Mill Road to a dead end in the Tollgate area. These two sections were one continual road until the construction of I-795 and the surrounding communities and business parks during the mid-1980s. Following the split, a portion of what is now called "Dolfield Road" was formerly part of Pleasant Hill Road.
A current proposal is in place to expand the portion of Dolfield Road north of Owings Mills New Town by extending its route to Reisterstown Road, widening the road to four lanes, constructing an interchange with I-795, and renaming it "Dolfield Boulevard". This plan has long been delayed due to community opposition for various reasons, including the demolition of some houses and removal of land from others and some history. A stub of the proposed Dolfield Boulevard has existed since the mid-1990s, serving as an entrance/exit to the area's Target store.
Maryland Route 130, better known as Greenspring Valley Road, is a two-lane cross-county road that begins near Reisterstown Road in the Garrison area, and continues to nearby Brooklandville, Maryland.
Garrison Forest Road is a two-lane, 5.4-mile road that begins at Greenspring Valley Road and continues to its end at Greenspring Avenue. The final block at the north end of the road is considered to be a part of Maryland Route 129. Garrison Forest Road is mostly lined with upscale housing developments and undeveloped land. Landmarks on or near this road include Rosewood Center, Ruxton Country School, and Maryland Veterans Cemetery.