Zip Code 20850
Rockville, Maryland — Montgomery County
📍 ZIP code 20850 is in Rockville, Montgomery County, Maryland.
ZIP code 20850 is located in Rockville, Montgomery County, Maryland. It is a zip code in the Eastern (EST/EDT) Time Zone with an estimated population of 50,365. The area code for ZIP code 20850 is 301.
Quick Answer
Zip code 20850 is in Rockville, Maryland (Montgomery County). It has a population of 50,365, median household income of $122,691, and median home value of $687,200.
Population
50,365
Income
$122,691
Home Value
$687,200
Climate
87°F / 27°F
About Zip Code 20850
Zip code 20850 is located in Rockville, Maryland, within Montgomery County. Home to approximately 50,365 residents, this area sits at an elevation of 446 ft and falls within the Eastern (EST/EDT) timezone. The local area code is 301.
The median household income is $122,691 per year, which is above the national median of $70,784. Homes in this zip code have a median value of $687,200, and the cost of living index is 209 (109% above the national average of 100).
Summers average a high of 87°F while winters drop to 27°F. The area receives about 41 in of rain and 9 in of snow annually. The zip code covers 14.1 square miles of land area and 0.1 square miles of water.
Key Statistics
50,365
$122,691
$687,200
Eastern (EST/EDT)
301
446 ft
14.1 sq mi
40.8
22,468
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Compare With Nearby Zip Codes
| Metric | 20850 | 20851 | 20880 | 20877 | 20855 | 20878 |
|---|---|---|---|---|---|---|
| City | Rockville, MD | Rockville, MD | Washington Grove, MD | Gaithersburg, MD | Derwood, MD | Gaithersburg, MD |
| Population | 50,365 | 14,660 | 590 | 39,068 | 16,557 | 65,236 |
| Median Income | $122,691 | $113,951 | $160,417 | $86,103 | $147,708 | $142,062 |
| Home Value | $687,200 | $523,800 | $594,200 | $462,500 | $614,900 | $675,200 |
| Cost of Living | 209 | 157 | 192 | 141 | 206 | 216 |
| Median Age | 40.8 | 38.6 | 58.9 | 37.2 | 41.8 | 41.4 |
Cost of Living
100 = National Average. Rockville's cost of living is 109% above the national average.
vs. State Avg
Above
Affordability
Expensive
Income-to-Home
5.6x
Demographics
Zip code 20850 has a population of 50,365 people with a median age of 40.8. There are 22,468 housing units in this area.
Racial & Ethnic Composition
Source: U.S. Census Bureau American Community Survey estimates.
Population History
Rockville (20850) population trend from 2010 to 2024
↓ -30.6%Source: U.S. Census Bureau estimates and American Community Survey data.
Climate & Weather
87°F
27°F
41 in
9 in
Rockville experiences warm summers with average highs around 87°F. Winters are cool with lows averaging 27°F. The area receives about 9 in of snow per year.
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Housing & Economy
Median Home Value
$687,200
Median Household Income
$122,691
With 22,468 housing units across 14.1 square miles, 20850 has a housing density of 1,593 units per square mile. The home price-to-income ratio is 5.6x.
Location & Geography
Latitude
39.0909°
Longitude
-77.1822°
Land Area
14.1 sq mi
Water Area
0.1 sq mi
Nearby Zip Codes
Zip codes closest to 20850 (Rockville, MD) with distances:
All Zip Codes in Rockville, MD
Other zip codes serving Rockville:
Related Cities in Maryland
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ZIP Codes with Similar Income Nationwide
The five U.S. ZIP codes whose median household income is closest to 20850's $122,691. A way to compare Rockville to economically similar communities elsewhere in the country.
Computed from U.S. Census Bureau ACS 5-Year Estimates by the Zip Code Near Me Data Team.
ZIP Codes with Similar Demographics
The five U.S. ZIP codes whose racial and ethnic composition most closely matches 20850 (Rockville, MD). Similarity is measured by cosine distance on the five-category ACS demographic vector.
Computed from U.S. Census Bureau ACS 5-Year Estimates by the Zip Code Near Me Data Team.
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People Also Ask
What zip code is Rockville, Maryland?
Rockville, Maryland uses zip code 20850 along with 3 other zip codes.
What county is zip code 20850 in?
Zip code 20850 is located in Montgomery County, Maryland.
What is the population of zip code 20850?
The population of zip code 20850 is 50,365 with a median age of 40.8.
Is 20850 in Rockville, Maryland?
Yes, zip code 20850 is in Rockville, Montgomery County, Maryland. The area code is 301.
Frequently Asked Questions
What city is zip code 20850 in?
Zip code 20850 is in Rockville, Maryland. It is part of Montgomery County and uses the Eastern (EST/EDT) timezone.
What is zip code 20850?
Zip code 20850 is a U.S. postal code in Rockville, Maryland (Montgomery County). It has a population of 50,365 and covers 14.1 square miles.
What is the population of zip code 20850?
The population of zip code 20850 (Rockville, MD) is 50,365 with a median age of 40.8. There are approximately 22,468 housing units in this area.
What is the median income in zip code 20850?
The median household income in zip code 20850 (Rockville, MD) is $122,691 per year. The cost of living index is 209 (100 = national average).
What is the average home price in zip code 20850?
The median home value in zip code 20850 (Rockville, MD) is $687,200. The cost of living index is 209 compared to the national average of 100.
What county is zip code 20850 in?
Zip code 20850 is located in Montgomery County, Maryland. The primary city is Rockville.
What is the area code for zip code 20850?
Zip code 20850 in Rockville, MD uses area code 301. It is located in the Eastern (EST/EDT) timezone.
Is zip code 20850 a good place to live?
Zip code 20850 (Rockville, MD) has a cost of living index of 209 (100 = national average), a median household income of $122,691, and median home values of $687,200. The median age is 40.8. Visit the full page for demographics, climate, and nearby zip code comparisons.
What is the cost of living in zip code 20850?
The cost of living index for zip code 20850 (Rockville, MD) is 209, where 100 represents the national average. This area is above the national average. Median home value: $687,200.
What schools serve zip code 20850?
Zip code 20850 in Rockville, Maryland is served by the local school district of Montgomery County. For specific school information, check your state's department of education or GreatSchools.org.
All demographic data on this page is sourced from the U.S. Census Bureau American Community Survey (ACS) 5-Year Estimates. ZIP code boundary and delivery data is sourced from the United States Postal Service (USPS). Data is updated periodically and may not reflect the most current figures. Census Bureau ZIP Code Tabulation Areas (ZCTAs) may differ slightly from USPS ZIP code boundaries.
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Data Sources
- Population, income, housing, age, and demographics
- U.S. Census Bureau, American Community Survey 5-Year Estimates, 2019-2023 vintage.
- ZIP to city and county mapping
- USPS and HUD-USPS ZIP-County Crosswalk.
- Time zones and area codes
- IANA tz database and NANPA.
- Elevation
- U.S. Geological Survey National Elevation Dataset (NED), via the USGS Elevation Point Query Service. Mapped to each ZCTA centroid coordinates. Last refreshed 2026-05-19.
- Last refreshed
- 2026-05-18.