ZIP 21757 · Keymar
Who lives in ZIP code 21757 (Keymar, MD): age, income, housing, education and work.
Source: uszips 2026 (ACS-based ZIP file)
2026 ZIP profile
Keymar, MD · Carroll County
uszips 2026
People2,671
Median age37.8
Household income$100,500
Home value$469,375
Median rent$1,408/mo
Poverty1.7%
College degree+29.5%
Commute31 min
Place
- Metro area
- Washington-Arlington-Alexandria, DC-VA-MD-WV
- Wider region
- Washington-Baltimore-Arlington, DC-MD-VA-WV-PA
- Metro division
- Frederick-Gaithersburg-Bethesda, MD
- Time zone
- Eastern
- Density
- 29 / sq mi
- Housing units
- 1,018
Spans 2 counties
Share of the ZIP's people in each county.
Age mix
18.9% are 65 or older; 79.7% are adults.
Household income
51.1% of households earn $100K+. Median per person: $52,258.
Education (adults 25+)
63.3% of degrees are in STEM fields.
Race
2.4% Hispanic or Latino (of any race).
Households & family
- Married
- 53.5%
- Never married
- 28.8%
- Divorced
- 11.7%
- Widowed
- 6.0%
- Family size
- 3.02
- Dual-income families
- 63.3%
Housing
- Own their home
- 82.4%
- Rent burden
- 16.7%
- Men / women
- 55% / 45%
Work
- In labor force
- 71.7%
- Unemployment
- 3.2%
- Self-employed
- 11.8%
- Farmers
- 6.6%
Community
- Charitable givers
- 33.8%
- Veterans
- 3.9%
- With a disability
- 10.1%
- No health insurance
- 2.4%
- Limited English
- 0.0%
Source: uszips 2026 (ACS-based ZIP file). Shares are percentages of people, households or adults as the measure implies.