21771 ZIP Code Demographics & Rankings

ZIP Code Type: STANDARD
County: Frederick County
Centroid: Latitude 39.388, Longitude -77.148
Time Zone: Eastern Time Zone (UTC -5 hours)
Observes DST: Yes

ZIP Code 21771 has segments in 4 Counties / Independent Cities (Carroll, Frederick, Howard, Montgomery).

Businesses Addresses: 708
PO Box Addresses: 317
Residential Addresses: 10,714

Multi-Family Addresses: 105
Single Family Addresses: 10,609

The ZIP Code maps and database are updated 4 times per year.
Database updated: April 1, 2020, Maps updated: May 1, 2020.

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Mount Airy, MD 21771 Data & Demographics (As of July 1, 2019)

HOUSING AFFORDABILITY INDEX
Mount Airy, MD 21771 Housing Affordability Index is 139 State of Maryland Housing Affordability Index is 118
The Housing Affordability Index base is 100 and represents a balance point where a resident with a median household income can normally qualify to purchase a median price home. Values above 100 indicate increased affordability, while values below 100 indicate decreased affordability.

WEALTH INDEX
Mount Airy, MD 21771 Wealth Index is 229 State of Maryland Wealth Index is 141
The Wealth Index is based on a number of indicators of affluence including average household income and average net worth, but it also includes the value of material possessions and resources. It represents the wealth of the area relative to the national level. Values above or below 100 represent above-average wealth or below-average wealth compared to the national level.

These new demographic attributes are availiable for Neighborhoods, Cities, Counties / Independent Cities, and ZIP Codes.

POPULATION
Total Population	30,654 (100%)
Population in Households	30,480 (99.4%)
Population in Families	27,572 (89.9%)
Population in Group Quarters¹	174 ( 0.6%)
Population Density	358
Diversity Index²	27

INCOME
Median Household Income	$117,938
Average Household Income	$146,599
Per Capita Income	$48,929
Wealth Index⁴	229

HOUSING
Total Housing Units	10,600 (100%)
Owner Occupied HU	9,190 (86.7%)
Renter Occupied HU	1,039 ( 9.8%)
Vacant Housing Units	371 ( 3.5%)
Median Home Value	$421,589
Housing Affordability Index³	139

HOUSEHOLDS
Total Households	10,229
Average Household Size	2.98
Family Households	8,366
Average Family Size	3

NOTES

Group Quarters - a place where people live or stay in a group living arrangement. Includes college residents halls, nursing facilities, military barracks, and correctional facilities.
The Diversity Index is a scale of 0 to 100 that represents the likelihood that two persons, chosen at random from the same area, belong to different race or ethnic groups. If an area's entire population belongs to one race AND one ethnic group, then the area has zero diversity. An area's diversity index increases to 100 when the population is evenly divided into two or more race/ethnic groups.
The Housing Affordability Index base is 100 and represents a balance point where a resident with a median household income can normally qualify to purchase a median price home. Values above 100 indicate increased affordability, while values below 100 indicate decreased affordability.
The Wealth Index is based on a number of indicators of affluence including average household income and average net worth, but it also includes the value of material possessions and resources. It represents the wealth of the area relative to the national level. Values above or below 100 represent above-average wealth or below-average wealth compared to the national level.

Mount Airy, MD 21771 - Peer Comparisons by Rank and Percentile

The table below compares 21771 to the other 461 ZIP Codes in Maryland by rank and percentile using July 1, 2019 data. The location Ranked # 1 has the highest value. A location that ranks higher than 75% of its peers would be in the 75th percentile of the peer group.

GROWTH RATE / YEAR	2010-2019	2019-2024
Population	0.48%	0.48%
Households	0.5%	0.49%
Families	0.41%	0.43%
Median Household Income		1.06%
Per Capita Income		1.71%

Variable Description	Rank	Percentile
Total Population	# 78	83rd
Population Density	# 240	48th
Diversity Index	# 334	28th
Median Household Income	# 63	87th
Per Capita Income	# 123	74th

Mount Airy, MD 21771 ZIP Code Profile

ZIP Code 21771: Basic Data & USPS Preferred City Name

Popular Places Near ZIP Code 21771

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Mount Airy, MD 21771 Data & Demographics (As of July 1, 2019)

HOUSING AFFORDABILITY INDEX

WEALTH INDEX

POPULATION

INCOME

HOUSING

HOUSEHOLDS

GROWTH RATE / YEAR

Mount Airy, MD 21771 - Peer Comparisons by Rank and Percentile

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