Waldorf is either named after the town of Walldorf, Germany, or has a similar derivation: that is, either a German word meaning "forest village," or named after the Waldenses, a 12th Century religious sect. Once a tobacco market village, it came to prominence in the 1950s as a gambling destination after slot machines were legalized in Charles County in 1949. The boom lasted until 1968 when gambling was once again outlawed. Its subsequent substantial growth as a residential community began with a 1970 loan package from the Department of Housing and Urban Development which fueled the giant planned community of St. Charles, south of Waldorf.
Waldorf is predominantly a bedroom community for many residents who commute to work at other points in the Washington, D.C., metropolitan area, especially personnel at Andrews Air Force Base. Waldorf's local jobs are primarily in the service and sales industry. Nearby St. Charles Towne Center, a shopping mall, opened in 1988 and was remodeled in 2007. St. Charles Towne Center draws shoppers and diners from Maryland, parts of Washington, D.C., and Virginia, causing Charles County to be promoted as the "shopping capital of Southern Maryland." U.S. Route 301, the main highway through the town, boasts the "Waldorf Motor Mile," with car dealerships located primarily along the northbound side. In 2005, Waldorf opened its third public high school (North Point High School), which has advanced science/technology programs; the Capital Clubhouse 24-hour indoor sports complex and ice rink also opened that year. In 2006, plans were announced to build two more shopping centers, including one with high-end stores and an attractive "lifestyle" town center design layout. Ground was also broken to build an office park with mid-rise office buildings near Western Parkway and Route 228 (Berry Road).
As of the census of 2000, there were 22,312 people, 7,603 households, and 5,991 families residing in the CDP. In the CDP, the population density was 1,746.0 people per square mile (674.1/km²). There were 7,827 housing units at an average density of 612.5/sq mi (236.5/km²). The racial makeup of the CDP was 61.11% White, 31.98% African American, 0.54% Native American, 2.59% Asian, 0.02% Pacific Islander, 0.88% from other races, and 2.88% from two or more races. Hispanic or Latino of any race were 2.91% of the population.
There were 7,603 households out of which 45.5% had children under the age of 18 living with them, 58.6% were married couples living together, 15.5% had a female householder with no husband present, and 21.2% were non-families. 14.8% of all households were made up of individuals and 2.2% had someone living alone who was 65 years of age or older. The average household size was 2.93 and the average family size was 3.24.
In the CDP the population was spread out with 30.6% under the age of 18, 7.5% from 18 to 24, 36.4% from 25 to 44, 20.7% from 45 to 64, and 4.8% who were 65 years of age or older. The median age was 33 years. For every 100 females there were 94.4 males. For every 100 females age 18 and over, there were 90.8 males.
The median income for a household in the CDP was $68,869, and the median income for a family was $71,439 (these figures had risen to $86,901 and $94,432 respectively as of a 2007 estimate). Males had a median income of $45,293 versus $35,386 for females. The per capita income for the CDP was $24,728. About 2.7% of families and 4.4% of the population were below the poverty line, including 6.4% of those under age 18 and 2.2% of those age 65 or over.
The major routes in Waldorf are:
Public transportation is provided by Van-Go, a bus system administered by Charles County for most of the county, including Waldorf, and interconnecting to nearby St.Mary's County Transit System buses. Buses operated by the Keller Bus Company and Maryland Department of Transportation also take commuters to downtown Washington, D.C., and ridership is rapidly growing. There is a large commuter parking lot on Mattawoman Beantown Road, with another one near Sears at Smallwood Parkway and Route 301.
Traffic in Waldorf is extremely congested at the moment, and the state is still evaluating options for a U.S. Route 301 bypass around western Waldorf. Through Virginia and Maryland, 301 along with U.S. Route 17 are used as alternate routes from I-95, due to I-95 traffic congestion Due to Waldorf's bedroom community nature and lack of any significant hometown industry, its highways can become very congested in the morning commutes north to Washington D.C., and also on Friday through Sunday in every direction due to shoppers, many of them visiting from other counties. Much of the congestion is seen at the intersection of Route 228 and 301 and Community Drive, on Berry Road going westward to Western Parkway, near St. Patrick's Drive, on Mall Circle surrounding St. Charles Towne Center, and on Smallwood Drive near the neighborhood of Carrington. Most traffic is in the southern areas of Waldorf.