ZIP Code 21150 – Simpsonville, MD
Simpsonville, Maryland · Howard County · Eastern time
| ZIP code | 21150 |
|---|---|
| City | Simpsonville |
| State | Maryland |
| County | Howard County |
| Population | Not published (no Census ZIP area) |
| Time zone | Eastern · local time |
| ZIP type | PO box or unique ZIP (no Census area) |
| Center (lat, long) | 39.2364, -76.9419 |
Area codes in this area
These are the area codes that most often serve ZIP 21150 (including overlays). The exact area code depends on the phone number — landlines, mobiles and overlays can differ even on the same street.
Map
Nearby ZIP codes
About ZIP 21150
ZIP code 21150 is assigned to Simpsonville, Maryland. It lies in Howard County. It is a PO-box-only or single-address ZIP, so the Census Bureau does not publish an area for it; the location shown is approximate. The closest neighboring ZIP is 21041 (Ellicott City), about 0 miles away.
Every address in 21150 also has a 4-digit add-on code (ZIP+4) that points to a smaller delivery area. Use the box above to find it.
Sources: US Census Bureau (ZCTA, county relationship files), GeoNames (CC BY 4.0), NANPA via NumberResearch.org (CC BY 4.0). Map © OpenStreetMap contributors. ZIP areas are approximate. Population: U.S. Census Bureau, ACS 5-year estimates, 2024 (ZCTA). Data sources