| City: | Olney, Maryland |
| County: | Montgomery County |
| Timezone: | Eastern (GMT -05:00) |
| Local Time: | 9:57:07 PM |
| Population: | No Population Data |
| Area Codes: | 227 / 240 / 301 |
| Classification: | PO Box |
| Coordinates: | 39.1533, -77.0674 |
| Quick Link: |
ZIP code 20830 serves a commercial area in Olney, Maryland, located in Montgomery County within the Washington, DC metro area. This isn't a residential ZIP code. It has zero population and no housing units, functioning instead as a postal designation for business delivery and PO Box services.
The Olney post office at this ZIP maintains 226 PO Boxes and delivers to 266 business addresses. All delivery addresses are located on a single street: Olney Laytonsville Road. With 83 ZIP+4 records showing UNIT designators, this suggests a commercial complex or business park where multiple businesses share the same street address.
This is classified as a PO Box ZIP, but street delivery is available (one city carrier route serves Olney Laytonsville Road). The broader Olney community receives residential mail through neighboring ZIP code 20832, which encloses this point location. So while 20830 appears as a PO Box classification in postal databases, it's more accurately described as a commercial facility ZIP that happens to include PO Box services.
Five business establishments employ 63 people at this location. Montgomery County's Olney area is an established suburban community north of Washington, DC, and this ZIP serves a specific commercial node within that larger residential area.
For PO Box mail, use:
PO Box [Number]
Olney, MD 20830For business delivery on Olney Laytonsville Road, use the street address with unit number:
[Street Number] Olney Laytonsville Rd Unit [Number]
Olney, MD 20830Only one street (Olney Laytonsville Road) with UNIT designators indicating commercial complex.
ZIP Code 20830 supports both business and residential activity. According to the Business Census (2024), there are 5 business establishments, employing about 76 people with an annual payroll of $9,524,000.
| # Residential Mailboxes: | 0Source: USPS |
| # Business Mailboxes: | 0Source: USPS |
| Total Delivery Receptacles: | 478Source: USPS |
| Single Family Delivery Units: | 0Source: USPS |
| Multi Family Delivery Units: | 0Source: USPS |
| # of Businesses: | 5Source: CBP |
| 1st Quarter Payroll: | $2,793,000Source: CBP |
| Annual Payroll: | $9,524,000Source: CBP |
| # of Employees: | 76Source: CBP |
ZIP Code 20830 is located in Montgomery County, Maryland, within the Washington-Arlington-Alexandria, DC-VA-MD-WV Metropolitan Statistical Area (CBSA 47900) and Maryland's 8th Congressional District. This Metro area has a population of 5,582,170 people, about 0.00% of whom live in ZIP Code 20830, and is subdivided into the Frederick-Gaithersburg-Bethesda, MD division. It covers 0 sq mi of land and a water area of 0 sq mi.
| CBSA Name: | Washington-Arlington-Alexandria, DC-VA-MD-WVSource: Census |
| CBSA Number: | 47900Source: Census |
| CBSA Type: | MetroSource: Census |
| CBSA Division: | Frederick-Gaithersburg-Bethesda, MD (CBSA Div 23224)Source: Census |
| CBSA Population: | 5,582,170Source: Census |
| MSA: | Washington-Baltimore, DC-MD-VA-WV CMSASource: Census |
| Land Area: | --Source: Census |
| Water Area: | --Source: Census |
| Congressional District: | 08Source: USPS |
| Congressional Land Area: | 859.85 sq miSource: Census |
| PMSA: | Washington, DC-MD-VA-WV PMSASource: Census |
| Intro Date: | < 2004-10Source: ZIP-Codes.com |
| Place FIPS Code: | 2458900Source: Census |
| Place Name: | Olney CDP; MarylandSource: Census |
We could not locate which school district 20830 belongs to, but we will update this once new district data is released. There are no public schools nor private schools with a mailing address in this ZIP Code. Listing Nearby schools instead. It also has 6 colleges, universities or post secondary education institutions nearby which would be a short commute to.
Our sources include trusted federal and licensed data from the United States Postal Service, U.S. Census Bureau, U.S. Geological Survey, Centers for Medicare & Medicaid Services, and the National Center for Education Statistics, along with proprietary datasets created by ZIP-Codes.com. Data last updated on February 1, 2026.