|— Census-designated place —|
|Country||United States of America|
|• Total||26.6 sq mi (68.8 km2)|
|• Land||25.2 sq mi (65.2 km2)|
|• Water||1.4 sq mi (3.6 km2)|
|Elevation||361 ft (110 m)|
|• Density||1,784.33/sq mi (653.56/km2)|
|Time zone||Eastern (EST) (UTC-5)|
|• Summer (DST)||EDT (UTC-4)|
|ZIP codes||20854, 20859|
|Area code(s)||301, 240|
|GNIS feature ID||0591056|
Potomac is a census-designated place (CDP) in Montgomery County, Maryland, United States, named for the nearby Potomac River. In 2009 CNNMoney.com listed Potomac as the seventh most affluent town in all the United States. Potomac is also the seventh most top-educated American small town according to Forbes.  In addition, Bloomberg Businessweek labeled Potomac as the twenty-ninth richest zip code in all of the United States in 2011 and had the largest population of any U.S. town to have a median income of more than $240,000. It is also tied with three other zip codes (all within the Upper West Side or Upper East Side of Manhattan) for the greatest concentration of the "1 percent" in America. Many Potomac residents work in nearby Washington, D.C.
The land which is now Potomac Village was first settled by Edward Offutt in 1714 after he was granted a 600-acre (2.4 km2) land grant "Clewerwell" by Lord Baltimore. His grant of land was by the Tehogee Indian Trail, an Indian trade route built by the Canaze Indian nation in 1716. Throughout the 18th century, what became known as Offutts Crossroads was a small, rural community which served planters and travelers. In the 19th century, a few small dwellings had been built along with a tavern established in 1820. By the time of the Civil War, the community contained two general stores, a blacksmith shop, and a post office which served a community of 100.
Offutts Crossroads was renamed Potomac in 1881 by John McDonald. An Irishman and veteran of the Civil War, McDonald settled in Potomac around that time. He petitioned for the name change since postal officials were asking for brief names and there were already several other communities in the area with the name "crossroads".
By the turn of the 20th century, Potomac experienced a period of growth. Thomas Perry, an operator of a nearby general store, built a house on the corner of Falls and River Roads in 1902. More residential structures were built on the northern section of Falls Road throughout the 1920s and 1930s. During the 1950s, Potomac was one of many communities in Montgomery County to experience suburbanization. Potomac quickly transformed from a rural farming community to a suburban community from the mid to late 20th century.
Numerous original buildings within Potomac Village have been demolished for the construction of strip malls and modern office buildings. However, in the surrounding area, many of the old farmhouses remain, though some are confined within suburban developments. The Perry Store has been restored and still stands as part of a bank, although the building was moved 21 feet in 1986 to allow for a project to widen the intersection of Falls and River Roads.
Potomac's geographical focal point is Potomac Village, a small cluster of upscale shops and businesses at the intersection of Maryland State Highway 189 (Falls Road, which connects the Great Falls of the Potomac River in the south to Rockville in the north) and Maryland State Highway 190 (River Road, which runs from western Montgomery County into Washington, D.C.). Saint Francis Episcopal Church, two gas stations (Sunoco and British Petroleum), and two grocery stores (Safeway and Giant) serve Potomac Village.
According to the United States Census Bureau, the CDP has a total area of 26.6 square miles (69 km2). 25.2 square miles (65 km2) of it is land and 1.4 square miles (3.6 km2) of it (5.20%) is water. It includes the ZIP Code 20854 for properties and 20859 for US Post Office Boxes.
As of the census of 2000, there were 46,255 people, 15,655 households, and 13,024 families residing in the CDP. The population density was 1,835.5 per square mile (709.4/km²). There were 15,960 housing units at an average density of 633.9 per square mile (244.7/km²). The racial makeup of the CDP was 79.46% White, 3.93% African American, 0.11% Native American, 13.37% Asian, 0.01% Pacific Islander, 0.90% from other races, and 2.22% from two or more races. Hispanic or Latino of any race were 5.38% of the population.
Of the 15,655 households, 38.4% included children under the age of 18, 74.8% were married couples living together, 6.6% had a female householder and 16.8% were non-families. 14.0% of all households were made up of individuals and 5.9% were persons living alone who were 65 or older. The average household size was 2.84 and the average family size was 3.10.
In the CDP, the age distribution was 26.3% under the age of 18, 4.6% from 18 to 24, 21.3% from 25 to 44, 34.0% from 45 to 64 and 13.8% who were 65 or older. The median age was 44. For every 100 females there were 91.6 males. For every 100 females 18 or older there were 87.3 males.
According to a 2007 estimate, the median income for a household in the CDP was $154,370, and the median income for a family was $177,506. Males had a median income of $100,000+ versus $78,442 for females. The per capita income for the CDP was $64,875. About 2.5% of families and 3.3% of the population were below the poverty line, including 3.6% of those under the age of 18 and 3.6% of those 65 and older.
According to a 2012 estimate, the median income was $242,000.
Population history 
- 1980: 40,402
- 1990: 45,634
- 2000: 46,255
- 2010: 44,965
Cultural events 
Each year during mid-October, local business and community participate in Potomac Day, a celebration of the community and the year's happenings. Events include a parade, a crafts show, food vendors, and giveaways. Potomac Day is normally held in Potomac Village.
Public Safety 
Potomac, MD receives fire prevention and protection services from the Cabin John Park Volunteer Fire Department and the Rockville Volunteer Fire Department. CJPVFD was established in 1930, provides emergency medical services and fire suppression/rescue services to the Potomac and West Bethesda areas of Montgomery County. It has two locations. The first, Fire Station #10, is located on River Road at Seven Locks Road. It serves as the headquarters for the volunteer organization and is staffed with a Truck Company, Engine Company, Basic Life Support Ambulance, Brush Truck, Water Rescue apparatus, and numerous support/command vehicles. Fire Station #30, which is located on Falls Road at Oaklyn Drive, is staffed with a Tanker, Advanced Life Support Medic Unit, an Engine Company, Brush Truck, and Water Rescue apparatus. RVFD was established in 1921 as the third incorporated fire department in Montgomery County. While RVFD has four locations serving the greater Rockville area, Fire Station #33 is located in Potomac on Falls Road near the intersection of Glen Road. At this station the RVFD provides its citizens with an Engine Company, a Basic Life Support Ambulance, a mobile air compressed known as Air 733, and a Canteen Unit. Both of these departments are staffed with both career and volunteer personal of the Montgomery County Fire Rescue Service and the Montgomery County Volunteer Fire Rescue Association respectively.
Notable people 
- 25 top-earning towns - Potomac, MD (7) - Money Magazine
- Montgomery County equity records, Judgment 1823-1826/67
- Montgomery County Post Office records
- "American FactFinder". United States Census Bureau. Retrieved 2008-01-31.