21150 ZIP Code — Simpsonville, MD
Howard County, Maryland
ZIP code 21150 is located in Simpsonville, Maryland, within Howard County. It covers approximately 0.00 square miles and serves a population of 0 residents. This is a standard ZIP code in the Eastern (ET) timezone, served by area code 443/410/240/667/301.
0
population
0.00
sq mi land
Standard
ZIP type
Eastern (ET)
timezone
21150 ZIP code map
Cities in ZIP code 21150
Below are the cities the US Postal Service accepts for ZIP code 21150. Using any city not on this list may result in mail delivery delays.
| City | Status |
|---|---|
| Simpsonville | Acceptable |
Demographics
updated 05/2026
| Population | |
|---|---|
| Total population | 0 |
| Population density | 0 / sq mi |
| State FIPS | 24 |
| County FIPS | 027 |
| Geography | |
|---|---|
| Land area | 0.00 sq mi |
| Water area | 0.00 sq mi |
| Latitude | 39.1857 |
| Longitude | -76.8776 |
| Timezone | Eastern (ET) |
| Area code | 443/410/240/667/301 |