ZIP Code 21157
ZIP Code Tabulation Area in Carroll County, Maryland.
- Population
- 40,191
- Median household income
- $102,835
- Median home value
- $394,100
+6.5%’19–’23
+22.0%’19–’23
+23.5%’19–’23
ZIP Code 21157 (Carroll County, Maryland) is home to about 40,191 residents. Its median household income of $102,835 runs below the Carroll County figure of $115,876.
Between 2019 and 2023, ZIP Code 21157's population grew 6.5% from 37,749 to 40,191, while its median gross rent rose 20.7% from $1,024 to $1,236.
The median gross rent is $1,236. 37.2% of adults 25 and older hold a bachelor's degree or higher.
Demographics
ACS 2019–2023- Population
- 40,191
- Median age
- 41.8 yrs
- Median household income
- $102,835
- Median home value
- $394,100
- Median gross rent
- $1,236
- Housing units
- 15,466
- Homeownership rate
- 75.9%
- Bachelor's degree or higher
- 37.2%
- Unemployment rate
- 3.1%
Trends
ACS 5-year · 2019–202337,74940,191
$84,294$102,835
$319,200$394,100
$1,024$1,236
| Year | Population | Median household income | Median home value | Median gross rent |
|---|---|---|---|---|
| 2019 | 37,749 | $84,294 | $319,200 | $1,024 |
| 2020 | 38,714 | $90,119 | $329,300 | $1,031 |
| 2021 | 39,978 | $92,846 | $344,200 | $1,073 |
| 2022 | 39,816 | $96,406 | $375,700 | $1,147 |
| 2023 | 40,191 | $102,835 | $394,100 | $1,236 |
Each year is a US Census Bureau ACS 5-year estimate ending that year.
Age distribution
Under 54.3%
5 to 1716.0%
18 to 2411.4%
25 to 3410.4%
35 to 4412.1%
45 to 5413.5%
55 to 6413.8%
65 to 7410.6%
75 and over8.0%
| Count | Share | |
|---|---|---|
| Under 5 | 1,713 | 4.3% |
| 5 to 17 | 6,437 | 16.0% |
| 18 to 24 | 4,577 | 11.4% |
| 25 to 34 | 4,190 | 10.4% |
| 35 to 44 | 4,846 | 12.1% |
| 45 to 54 | 5,438 | 13.5% |
| 55 to 64 | 5,527 | 13.8% |
| 65 to 74 | 4,266 | 10.6% |
| 75 and over | 3,197 | 8.0% |
Race & ethnicity
| Count | Share | |
|---|---|---|
| White (non-Hispanic) | 34,579 | 86.0% |
| Black or African American | 1,500 | 3.7% |
| American Indian & Alaska Native | 22 | 0.1% |
| Asian | 344 | 0.9% |
| Native Hawaiian & Pacific Islander | 0 | 0.0% |
| Some other race | 298 | 0.7% |
| Two or more races | 962 | 2.4% |
| Hispanic or Latino (any race) | 2,486 | 6.2% |
Educational attainment (age 25+)
No high school diploma7.4%
High school graduate28.8%
Some college or associate's26.6%
Bachelor's degree22.8%
Graduate or professional degree14.4%
| Count | Share | |
|---|---|---|
| No high school diploma | 2,040 | 7.4% |
| High school graduate | 7,912 | 28.8% |
| Some college or associate's | 7,302 | 26.6% |
| Bachelor's degree | 6,266 | 22.8% |
| Graduate or professional degree | 3,944 | 14.4% |
Commute to work
- Mean travel time to work
- 31 min
Drove alone74.9%
Carpooled6.6%
Public transit0.4%
Walked2.1%
Bicycle0.3%
Worked from home15.2%
Other means0.6%
How workers get to work
| Count | Share | |
|---|---|---|
| Drove alone | 15,522 | 74.9% |
| Carpooled | 1,362 | 6.6% |
| Public transit | 77 | 0.4% |
| Walked | 429 | 2.1% |
| Bicycle | 62 | 0.3% |
| Worked from home | 3,149 | 15.2% |
| Other means | 131 | 0.6% |
Travel time
| Count | Share | |
|---|---|---|
| Under 15 min | 5,338 | 30.4% |
| 15 to 29 min | 3,628 | 20.6% |
| 30 to 44 min | 2,809 | 16.0% |
| 45 to 59 min | 2,963 | 16.9% |
| 60+ min | 2,845 | 16.2% |
Households
- Average household size
- 2.60
- Poverty rate
- 7.5% (2,842 of 37,965)
| Count | Share | |
|---|---|---|
| Family households | 10,254 | 70.0% |
| Nonfamily households | 4,392 | 30.0% |
Housing
- Median year structure built
- 1978
Occupancy
| Count | Share | |
|---|---|---|
| Occupied | 14,646 | 94.7% |
| Vacant | 820 | 5.3% |
Tenure (of occupied units)
| Count | Share | |
|---|---|---|
| Owner-occupied | 11,111 | 75.9% |
| Renter-occupied | 3,535 | 24.1% |
1-unit, detached71.5%
1-unit, attached10.3%
2 to 4 units5.1%
5 to 19 units8.9%
20 or more units4.0%
Mobile home & other0.2%
Units in structure
| Count | Share | |
|---|---|---|
| 1-unit, detached | 11,056 | 71.5% |
| 1-unit, attached | 1,592 | 10.3% |
| 2 to 4 units | 792 | 5.1% |
| 5 to 19 units | 1,381 | 8.9% |
| 20 or more units | 615 | 4.0% |
| Mobile home & other | 30 | 0.2% |
Geography
- ZCTA
- 21157
- Land area
- 78 sq mi
- Water area
- 0.15 sq mi
- Center point
- 39.5486, -76.9836
Counties this ZIP covers
1Compare with nearby ZIP codes
6National ZIP rankings
21- Largest by population
- Most densely populated
- Highest median household income
- Highest median home value
- Most affordable home values
- Highest median gross rent
- Cheapest median gross rent
- Oldest by median age
- Youngest by median age
- Most college-educated
- Highest poverty rate
- Lowest poverty rate
- Highest homeownership rate
- Lowest homeownership rate
- Longest commutes
- Shortest commutes
- Largest households
- Newest housing
- Oldest housing
- Fastest-growing (2019–2023)
- Fastest-shrinking (2019–2023)