Data Last Updated: January 1, 2025

Montgomery County, MD ZIP Codes

ZIP Codes: Shows how many general ZIP Codes, PO Boxes, Unique (Business), and Multi County ZIP Codes are associated with Montgomery, MD.	83 ZIP Codes (42 General, 25 PO Box, 10 Unique, & 6 Multi County) [More Details]
Area Codes: The Telephone Area Codes that are associated with Montgomery, MD. Area Codes are used in the North American Numbering Plan (NANP) to facilitate phone routing. There are approximately 350 area codes in use in the United States.	227, 240, 301, 324, 369
Timezone: Time zone designation within the U.S. Please note that not all areas in the U.S. observe daylight saving time which can affect actual local time for this city. There are 7 standard time zones which are, from west to east: Hawaii-Aleutian, Alaska, Pacific, Mountain, Central, Eastern, Atlantic. Also included in U.S. Territories are Samoa, Guam and Palau.	Eastern
Local Time: The current local time for each timezone. If more than 1 time zone for this area, all local times will be shown. Counties can cross timezones, so more than 1 may be shown.	12:00:00 AM
Population: The population of Montgomery, MD from the U.S. Census 2020. Included are U.S. Citizens, permanent residents, temporary migrants, and undocumented individuals. The total population represents people who live in the city, not just those present while the Census was being completed.	1,062,061 [More Details]
FIPS: FIPS stands for Federal Information Processing Standards, which are a set of publicly announced standards for computer systems. A county FIPS code is a unique numeric identifier for a county in the United States, assigned by the National Institute of Standards and Technology (NIST). County FIPS codes have five digits, with the first two digits identifying the state and the last 3 indicating the county.	24031
CBSA: A Core Based Statistical Area (CBSA) is the recognized term for a region that functions around an urban core with a population of at least 10,000 people, according to the standards set by the Office of Management and Budget (OMB) in 2000. A CBSA is divided into two subsets: Metro and Micro, and these classifications are determined by population density. A Micro area is identified by a population ranging between 10,000 to 50,000, while a Metro area is defined as having a population that exceeds 50,000.	Washington-Arlington-Alexandria, DC-VA-MD-WV
Land Area: The approximate amount of land area covered by Montgomery, MD in square miles. The Land Area provided by the Census Bureau is based on geographic boundaries that include the mainland, islands, inland, coastal, Great Lakes, and territorial waters associated with each city.	493 square miles
Water Area: The approximate amount of water area covered by Montgomery, MD in square miles. Calculations by the Census Bureau for Water Area take into account inland bodies of water, coastal regions, Great Lakes, and territorial sea waters. This encompasses features such as lakes, reservoirs, rivers, and coastal water bodies.	14 square miles
Coordinates: The latitude/longitude centroid coordinates for Montgomery County, MD.	-77.204181, 39.136334
Quick Link: Copy the direct link to the Montgomery, MDCounty page and use anywhere you like!	https://www.zip-codes.com/county/md-montgomery.asp

Montgomery, MD ZIP Code Boundaries

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Montgomery County, MD Covers 83 ZIP Codes

ZIP Code	Classification	City	Population	% of Population
ZIP Code 20705 *	General	Beltsville	29,456	--
ZIP Code 20707 *	General	Laurel	37,702	--
ZIP Code 20777 *	General	Highland	3,527	--
ZIP Code 20783 *	General	Hyattsville	48,946	--
ZIP Code 20810	Unique	Bethesda	0	0.00%
ZIP Code 20811	Unique	Bethesda	0	0.00%
ZIP Code 20812	General	Glen Echo	287	0.03%
ZIP Code 20813	P.O. Box	Bethesda	0	0.00%
ZIP Code 20814	General	Bethesda	31,919	3.01%
ZIP Code 20815	General	Chevy Chase	31,517	2.97%
ZIP Code 20816	General	Bethesda	17,035	1.60%
ZIP Code 20817	General	Bethesda	38,908	3.66%
ZIP Code 20818	General	Cabin John	1,832	0.17%
ZIP Code 20824	P.O. Box	Bethesda	0	0.00%
ZIP Code 20825	P.O. Box	Chevy Chase	0	0.00%
ZIP Code 20827	P.O. Box	Bethesda	0	0.00%
ZIP Code 20830	P.O. Box	Olney	0	0.00%
ZIP Code 20832	General	Olney	25,969	2.45%
ZIP Code 20833	General	Brookeville	7,913	0.75%
ZIP Code 20837	General	Poolesville	6,634	0.62%
ZIP Code 20838	General	Barnesville	218	0.02%
ZIP Code 20839	General	Bealsville	176	0.02%
ZIP Code 20841	General	Boyds	9,538	0.90%
ZIP Code 20842	General	Dickerson	2,021	0.19%
ZIP Code 20847	P.O. Box	Rockville	0	0.00%
ZIP Code 20848	P.O. Box	Rockville	0	0.00%
ZIP Code 20849	P.O. Box	Rockville	0	0.00%
ZIP Code 20850	General	Rockville	51,045	4.81%
ZIP Code 20851	General	Rockville	14,327	1.35%
ZIP Code 20852	General	Rockville	48,347	4.55%
ZIP Code 20853	General	Rockville	30,611	2.88%
ZIP Code 20854	General	Potomac	50,698	4.77%
ZIP Code 20855	General	Derwood	17,003	1.60%
ZIP Code 20857	Unique	Rockville	0	0.00%
ZIP Code 20859	P.O. Box	Potomac	0	0.00%
ZIP Code 20860	General	Sandy Spring	2,079	0.20%
ZIP Code 20861	General	Ashton	3,067	0.29%
ZIP Code 20862	General	Brinklow	453	0.04%
ZIP Code 20866	General	Burtonsville	15,199	1.43%
ZIP Code 20868	General	Spencerville	671	0.06%
ZIP Code 20871	General	Clarksburg	28,557	2.69%
ZIP Code 20872	General	Damascus	13,349	1.26%
ZIP Code 20874	General	Germantown	62,908	5.92%
ZIP Code 20875	P.O. Box	Germantown	0	0.00%
ZIP Code 20876	General	Germantown	26,034	2.45%
ZIP Code 20877	General	Gaithersburg	37,577	3.54%
ZIP Code 20878	General	Gaithersburg	65,990	6.21%
ZIP Code 20879	General	Gaithersburg	26,176	2.46%
ZIP Code 20880	P.O. Box	Washington Grove	504	0.05%
ZIP Code 20882	General	Gaithersburg	13,890	1.31%
ZIP Code 20883	P.O. Box	Gaithersburg	0	0.00%
ZIP Code 20884	P.O. Box	Gaithersburg	0	0.00%
ZIP Code 20885	P.O. Box	Gaithersburg	0	0.00%
ZIP Code 20886	General	Montgomery Village	35,649	3.36%
ZIP Code 20889	Unique	Bethesda	1,010	0.10%
ZIP Code 20891	P.O. Box	Kensington	0	0.00%
ZIP Code 20892	Unique	Bethesda	2	0.00%
ZIP Code 20894	Unique	Bethesda	0	0.00%
ZIP Code 20895	General	Kensington	19,753	1.86%
ZIP Code 20896	P.O. Box	Garrett Park	1,019	0.10%
ZIP Code 20898	P.O. Box	Gaithersburg	0	0.00%
ZIP Code 20899	Unique	Gaithersburg	125	0.01%
ZIP Code 20901	General	Silver Spring	36,537	3.44%
ZIP Code 20902	General	Silver Spring	52,533	4.95%
ZIP Code 20903	General	Silver Spring	24,103	2.27%
ZIP Code 20904	General	Silver Spring	59,051	5.56%
ZIP Code 20905	General	Silver Spring	17,700	1.67%
ZIP Code 20906	General	Silver Spring	71,641	6.75%
ZIP Code 20907	P.O. Box	Silver Spring	0	0.00%
ZIP Code 20908	P.O. Box	Silver Spring	0	0.00%
ZIP Code 20910	General	Silver Spring	45,610	4.29%
ZIP Code 20911	P.O. Box	Silver Spring	0	0.00%
ZIP Code 20912	General	Takoma Park	25,463	2.40%
ZIP Code 20913	P.O. Box	Takoma Park	0	0.00%
ZIP Code 20914	P.O. Box	Silver Spring	0	0.00%
ZIP Code 20915	P.O. Box	Silver Spring	0	0.00%
ZIP Code 20916	P.O. Box	Silver Spring	0	0.00%
ZIP Code 20918	P.O. Box	Silver Spring	0	0.00%
ZIP Code 20993	Unique	Silver Spring	0	0.00%
ZIP Code 21771 *	General	Mount Airy	30,697	--
ZIP Code 21797 *	General	Woodbine	8,956	--

* Indicates a Multi County ZIP Code. These ZIP Codes partially cross over into Montgomery, MD, but will mostly cover area in a different County. Not included in % of Population calculations.

Important Montgomery, MD Information

Montgomery County, MD Covers 83 ZIP Codes. This includes 42 General ZIP Codes, 25 PO Box ZIP Codes, and 10 Unique (reserved for Business and Volume Mail Receivers). There are also 6 Multi County ZIP Codes. These records are assigned a different primary county, but they partially cover area in Montgomery County.

The population for Montgomery County is 1,062,061, according to the U.S. Census. Population Density is 2,154.28 persons per square mile. With 404,423 Housing Units, the Average Household Size is 2.72 persons. There are 386,931 Family Households with an Average Family Size of 2.97 persons. 5.96% of the population is without Health Insurance. The 67.33% Employment Rate is 7.53% above the national average of 59.8%.729,167 people aged 25+ have some educational achievement, with 59.78% (or 435,904 people) having attained a Bachelor's Degree or higher.More Demographics are available below.

There are 5 area codes serving this area including227, 240, 301, 324 and 369. Montgomery is also located in the Eastern timezone and the current local time is shown above.

Montgomery is part of the Washington-Arlington-Alexandria, DC-VA-MD-WV Core Based Statistical Area (CBSA). Its CBSA Code is 47900.It is classified as a metro area, which means the combined population is 50,000 or more (at its core).

CBSAs are defined by the OMB as geographic areas that have at least one core with a population of 10,000 or more (for a micro area) and adjacent territory with a high degree of social and economic integration. CBSA codes are commonly used to accurately file Medicare claims and to verify applicable incentives using a patient's ZIP Code.

ZIP Codes in Montgomery, MD have 414,719 Residential mailboxes and 22,193 Business mailboxes.There are 27,837 businesses with a total of 437,251 employees. That is an average of 15.7 employees per business. Annual payroll for these businesses is $35,429,139,000. Other Demographics

Montgomery County Demographic Profile

Population & People

Total Population

1,062,061

Income

Median Household Income

$117,345

Housing

Total Housing Units

404,423

Health

Without Healthcare Coverage

5.96%

Business & Economy

Total Businesses

27,837

Families

Total Households

386,931

Employment

Employment Rate

67.33%

Education

Bachelor's Degree or Higher

59.78%

Total Population: Total number of people from the 2020 U.S. Census for Montgomery, MD. This reflects the exact count of this area at that point in time, not future estimates, regardless of citizenship or immigration status. It is intended to count all persons living within the geographic area, not just those present on the day of the census.	1,062,061
Current Population Estimate: This field gives the estimated household population for All ZIP Codes in Montgomery, MD. This is derived from known delivery information, household occupancy rates, household size, and more to come up with an accurate estimation for the current population. IMPORTANT: This does not include population totals for persons in nursing homes, correctional facilities, or other institutions. This is an estimation of the household population based on US Postal Service delivery information.	1,126,022
Total Households: Total number of Households from the 2020 U.S. Census for Montgomery, MD. A Household includes everyone living in a residential housing unit. This includes families, roommates in a single residence, or a person living alone.	386,931
Total Housing Units: The total number of Housing Units is the number of occupied units + the number of vacant units. Ownership is defined by whether the unit is occupied by an owner or by a tenant. Owner occupancy means that the owner lives in the unit. This value comes from the 2020 U.S. Census and is not a projection or estimate.	404,423
Average Household Size: The Average Household Size, is obtained by dividing the number of people in Households (excluding those in group quarters, nursing home, prisons, and dorm rooms) by the number of Households. A Household includes everyone living in a residential unit. Those who do not live in a household are classified as living in group accommodation. This value is an estimate from the U.S. Census ACS (American Community Survey) and is updated yearly.	2.72
Average Family Size: Average Family Size is calculated by dividing the number of people in a Family Household by the number of Family Households. The U.S. Census Bureau defines family households as households consisting of two or more individuals who are related by birth, marriage, or adoption. They also may include other unrelated people. Non-family households consist of people who live alone or who share their residence with unrelated individuals. The Average Family Size only looks at the households classified as Family Households. This value is an estimate from the U.S. Census ACS (American Community Survey) and is updated yearly.	2.97

Other Montgomery Demographics

# Residential Mailboxes: The number of active residential delivery mailboxes and centralized units. This excludes PO Boxes and all other contract box types.	414,719
# Business Mailboxes: The number of active business delivery mailboxes and centralized units. This excludes PO Boxes and all other contract box types.	22,193
Total Delivery Receptacles: The total number of delivery receptacles. This includes curb side mailboxes, centralized units, PO Boxes, NDCBU, and contract boxes. This count is for Residential and Business combined.	529,955
Single Family Delivery Units: Total count of single family mail delivery receptacles; generally analogous to homes.	196,227
Multi Family Delivery Units: Total count of multifamily mail delivery receptacles; generally analogous to apartments.	135,166

# of Businesses: The total number of Business Establishments. Data taken from Business Census 2023.	27,837
1st Quarter Payroll: The total payroll for the first quarter. Data taken from Business Census 2023.	$9,138,542,000
Annual Payroll: The total annual payroll . Data taken from Business Census 2023.	$35,429,139,000
# of Employees: The total number of employees for all ZIP Codes in this City. Data taken from Business Census 2023.	437,251

Sum of all ZIP Codes assigned Montgomery, MD as their primary County.

References

U.S. Postal Service [Last Updated: 1/1/2025], https://www.usps.com
ZIP-Codes.com Internal Data Creation [Last Updated: 1/1/2025], https://www.zip-codes.com
U.S. Geological Survey [Updated as needed], https://www.usgs.gov
U.S. Census [Updated Yearly], https://www.census.gov
U.S. Census 2020 [Decennial] [Last Updated: 5/25/2023], https://www.census.gov