ZIP Code 21771 has segments in 4 Counties / Independent Cities (Carroll, Frederick, Howard, Montgomery).
The ZIP Code maps and database are updated 4 times per year.
Database updated: January 1, 2021, Maps updated: November 4, 2020.
|Total Population||30,812 (100%)|
|Population in Households||30,639 (99.4%)|
|Population in Families||27,701 (89.9%)|
|Population in Group Quarters1||173 ( 0.6%)|
|Median Household Income||$119,972|
|Average Household Income||$147,084|
|% of Income for Mortgage4||15%|
|Per Capita Income||$49,116|
|Total HU (Housing Units)||10,656 (100%)|
|Owner Occupied HU||9,268 (87.0%)|
|Renter Occupied HU||1,019 ( 9.6%)|
|Vacant Housing Units||369 ( 3.5%)|
|Median Home Value||$422,288|
|Average Home Value||$454,308|
|Housing Affordability Index3||162|
|Average Household Size||2.98|
|Average Family Size||3|
GROWTH RATE / YEAR
|Median Household Income||0.89%|
|Per Capita Income||1.69%|
|Owner Occupied HU||0.61%|
The table below compares 21771 to the other 457 ZIP Codes in Maryland by rank and percentile using July 1, 2020 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.
|Total Population||# 76||84th|
|Population Density||# 236||49th|
|Median Household Income||# 75||84th|
|Housing Affordability Index||# 256||56th|
|Per Capita Income||# 145||68th|
|Diversity Index||# 332||28th|
Additional comparisons and rankings can be made with a VERY EASY TO USE Maryland Census Data Comparison Tool.