Westminster, MD ZIP Codes
2 ZIP codes serve Westminster, Maryland: 21157 and 21158. Together they are home to 61,067 residents in 23,236 households. That is more than the 20,445 people counted inside Westminster city limits, because these ZIP codes reach past its boundary. Median household income ranges from $104,966 in 21157 to $109,827 in 21158.
Westminster city limits (Census)
| Measure | Census figure |
|---|---|
| Residents | 20,445 |
| Households | 7,949 |
| Median household income | $86,219 |
| Median home value | $337,600 |
| Median age | 38.5 |
| Median rent | $1,476 |
All 2 ZIP codes together
| Measure | Value |
|---|---|
| Residents (sum of ZIP codes) | 61,067 |
| Households (sum of ZIP codes) | 23,236 |
| Median household income, range across ZIP codes | $104,966 (21157) to $109,827 (21158) |
| Household-weighted average of ZIP medians (an approximation, not a true median) | $106,734 |
| Homeowners | 77.7% |
| Households with kids under 18 | 29.9% |
| Moved in the past year | 7.3% |
| Carrier routes in EDDM2GO's route library | 45 routes, 23,156 homes (2 of 2 ZIP codes) |
Top facts
- Highest median household income in Westminster: 21158 ($109,827)
- Most residents: 21157 (38,984 people)
- Highest homeownership: 21158 (79.2% own their home)
- Most households with kids: 21158 (32.1% of households)
- Most new movers: 21157 (7.7% moved in last year)
- Youngest median age: 21158 (41.6 years)
- Highest median home value: 21157 ($424,100)
Every ZIP code in Westminster
| ZIP | Mailing city | Residents | Households | Median income | Home value | Homeowners | With kids | New movers | Carrier routes | Mailboxes | Why listed |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 21157 | Westminster | 38,984 | 14,785 | $104,966 | $424,100 | 76.8% | 28.6% | 7.7% | 28 | 16,519 | 4% of its land; mailing city |
| 21158 | Westminster | 22,083 | 8,451 | $109,827 | $384,700 | 79.2% | 32.1% | 6.7% | 17 | 8,222 | 5% of its land; mailing city |
A ZIP code is listed for Westminster when at least 10% of its land lies inside Westminster city limits, when it holds at least 10% of the place's land, or when its USPS mailing city is Westminster. The table shows which applies. Totals add up whole ZIP codes, so they include any parts outside Westminster.
Counties
- Carroll County — 14 ZIP codes
Price a mailing to Westminster ZIP codes
EDDM guides
Pick carrier routes on the EDDM route map
Frequently asked questions
- What ZIP codes are in Westminster, MD?
- 21157 and 21158. A ZIP code is listed for Westminster when at least 10% of its land lies inside Westminster city limits, when it holds at least 10% of the place's land, or when its USPS mailing city is Westminster.
- What is the population of Westminster, MD?
- The Census Bureau counts 20,445 residents inside Westminster city limits (ACS 2020–2024). The 2 ZIP codes that serve Westminster hold 61,067 residents in all.
- What is the median household income in Westminster, MD?
- $86,219 inside Westminster city limits, per the Census Bureau. Across its ZIP codes the medians run from $104,966 to $109,827.
- Which Westminster ZIP code has the highest median household income?
- 21158, at $109,827, among ZIP codes with at least 1,000 residents.
- How many carrier routes and mailboxes are in Westminster, MD?
- For the 2 of 2 ZIP codes in EDDM2GO's stored route library: 45 carrier routes reaching 23,156 residential and 1,584 business mailboxes.
This product uses the Census Bureau Data API but is not endorsed or certified by the Census Bureau.