ZIP Code 20851 - Rockville Maryland

20851 Overview

ZIP Code 20851 is located in Rockville Maryland. Portions of 20851 are also in Aspen Hill and North Bethesda. 20851 is entirely within Montgomery County. Regionally, 20851 is located in Metro DC.

Stats Demographics Geography Politics Schools Climate Related Pages

ZIP Code 20851 Quick Stats

ZIP Code NameRockville
Primary CountyMontgomery County
ZIP Code TypeStandard
Population (2022)14,659
Area Code(s)240 / 301
Current Time
EST

ZIP Code 20851 Map

20851 Demographics

20851 can be classified socioeconomically as Middle Class class compared to other ZIP Codes in Maryland based on Median Household Income and Average Adjusted Gross Income. The majority race/ethnicity residing in 20851 is White. The majority race/ethnicity attending public schools in 20851 is Hispanic. The current unemployment level in 20851 is 3.1%.

Population14,659
Population Growth Rate-2.27%
Population Density6,415 People per Square Mile
Total Households4,932
Percentage High Income Households6.6%
Median Household Income (2021)$97,318
Average Adjusted Gross Income (2021)$308,200
Current Unemployment Rate (December 2024)3.1%
Majority Race/EthnictyWhite - 36.82%
Public School Majority Race/EthnictyHispanic - 49.02%

20851 Race/Ethnicty Breakdown

Race/EthnictyTotalPercentage
White5,84836.82%
Black1,84911.64%
Hispanic5,75136.21%
Asian2,30614.52%
Native American1270.8%
Hawaiian/Pac. Islander00%

20851 Public School Race/Ethnicty Breakdown

Race/EthnictyTotalPercentage
White54124.02%
Black31013.77%
Hispanic1,15251.15%
Asian24410.83%
Native American40.18%
Hawaiian/Pac. Islander10.04%

20851 Educational Attainment Levels

Highest Education Level AttainedTotalPercentage
Less Than 1 Year of College3303.83%
Bachelor Degree2,02723.5%
High School Diploma2,05723.85%
No High School Diploma2282.64%
GED or Alternate1892.19%
1 or More Years of College1,24514.43%
Associates Degree4044.68%
Masters Degree1,16613.52%
Professional Degree3474.02%
Doctorate Degree6327.33%

20851 Geography

Coordinates39.07833862,-77.12201691
Adjacent ZIP Codes
Cities/Towns in 20851
RegionMetro DC
Metropolitan/Micropolitan Stat AreaWashington-Arlington-Alexandria, DC-VA-MD-WV
Time ZoneEastern Standard Time
IANA TimezoneAmerica/New_York
Area2 Square Miles

20851 Weather and Climate Data

Plant Hardiness ZoneZone 7a: 0F to 5F
Average First Frost DateOctober 11 - 20
Average Last Frost DateApril 21 - 31
Koppen-Geiger Climate ZoneCfa - Humid Subtropical Climate
Ecoregion64c - Piedmont Uplands

20851 Annual Climate Data

JanFebMarAprMayJunJulAugSepOctNovDecAnnual
Avg Min Temp (°F)23263342516065635744362844
Avg Max Temp (°F)41445465748186847766554564
Avg Precip (In.)3.322.853.883.254.393.763.923.744.123.423.433.2243.3

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