Ilchester, MD ZIP Codes
2 ZIP codes serve Ilchester, Maryland: 21043 and 21075. Together they are home to 85,888 residents in 30,606 households. That is more than the 28,364 people counted inside Ilchester Census-designated place, because these ZIP codes reach past its boundary. Median household income ranges from $135,303 in 21075 to $148,125 in 21043.
Ilchester Census-designated place
| Measure | Census figure |
|---|---|
| Residents | 28,364 |
| Households | 10,028 |
| Median household income | $152,103 |
| Median home value | $532,400 |
| Median age | 36.8 |
| Median rent | $2,115 |
All 2 ZIP codes together
| Measure | Value |
|---|---|
| Residents (sum of ZIP codes) | 85,888 |
| Households (sum of ZIP codes) | 30,606 |
| Median household income, range across ZIP codes | $135,303 (21075) to $148,125 (21043) |
| Household-weighted average of ZIP medians (an approximation, not a true median) | $142,663 |
| Homeowners | 65.7% |
| Households with kids under 18 | 40.8% |
| Moved in the past year | 14.2% |
| Carrier routes in EDDM2GO's route library | 48 routes, 32,655 homes (2 of 2 ZIP codes) |
Top facts
- Highest median household income in Ilchester: 21043 ($148,125)
- Most residents: 21043 (48,525 people)
- Highest homeownership: 21043 (66.9% own their home)
- Most households with kids: 21075 (42.7% of households)
- Most new movers: 21075 (17.0% moved in last year)
- Youngest median age: 21075 (34.1 years)
- Highest median home value: 21043 ($620,900)
Every ZIP code in Ilchester
| ZIP | Mailing city | Residents | Households | Median income | Home value | Homeowners | With kids | New movers | Carrier routes | Mailboxes | Why listed |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 21043 | Ellicott City | 48,525 | 17,568 | $148,125 | $620,900 | 66.9% | 39.4% | 12.0% | 28 | 19,734 | 25% of its land |
| 21075 | Elkridge | 37,363 | 13,038 | $135,303 | $455,300 | 64.1% | 42.7% | 17.0% | 20 | 14,609 | 47% of its land |
A ZIP code is listed for Ilchester when at least 10% of its land lies inside the Ilchester Census-designated place, when it holds at least 10% of the place's land, or when its USPS mailing city is Ilchester. The table shows which applies. Totals add up whole ZIP codes, so they include any parts outside Ilchester.
Counties
- Howard County — 24 ZIP codes
Nearby cities sharing these ZIP codes
- Ellicott City — 2 ZIP codes
- Elkridge — 2 ZIP codes
Price a mailing to Ilchester ZIP codes
EDDM guides
Pick carrier routes on the EDDM route map
Frequently asked questions
- What ZIP codes are in Ilchester, MD?
- 21043 and 21075. A ZIP code is listed for Ilchester when at least 10% of its land lies inside the Ilchester Census-designated place, when it holds at least 10% of the place's land, or when its USPS mailing city is Ilchester.
- What is the population of Ilchester, MD?
- The Census Bureau counts 28,364 residents inside Ilchester Census-designated place (ACS 2020–2024). The 2 ZIP codes that serve Ilchester hold 85,888 residents in all.
- What is the median household income in Ilchester, MD?
- $152,103 inside Ilchester Census-designated place, per the Census Bureau. Across its ZIP codes the medians run from $135,303 to $148,125.
- Which Ilchester ZIP code has the highest median household income?
- 21043, at $148,125, among ZIP codes with at least 1,000 residents.
- How many carrier routes and mailboxes are in Ilchester, MD?
- For the 2 of 2 ZIP codes in EDDM2GO's stored route library: 48 carrier routes reaching 32,655 residential and 1,683 business mailboxes.
This product uses the Census Bureau Data API but is not endorsed or certified by the Census Bureau.