| City: | Gaithersburg, Maryland |
| County: | Montgomery County |
| Timezone: | Eastern (GMT -05:00) |
| Local Time: | 9:57:38 PM |
| Population: | No Population Data |
| Area Codes: | 227 / 240 / 301 |
| Classification: | PO Box |
| Coordinates: | 39.1434, -77.2018 |
| Quick Link: |
ZIP code 20885 isn't a town at all. It's a dedicated postal code for a business park on Firstfield Road in Gaithersburg, Maryland. With zero residential population and 111 registered businesses, this ZIP exists purely to serve commercial mail operations in Montgomery County's suburban office corridor.
The post office maintains 128 PO Boxes here, all serving businesses rather than residents. Every delivery address in this ZIP uses Firstfield Road with unit numbers, typical of a multi-tenant office complex. This single-street pattern, combined with the zero-population census data, confirms this is what USPS calls a Large Volume Receiver ZIP.
Geographically, 20885 sits as a point location within ZIP 20878, which handles residential mail for the surrounding Gaithersburg area. This arrangement lets businesses at the Firstfield Road complex receive their own dedicated postal service without mixing with residential delivery routes. Nearby communities include Montgomery Village, Germantown, and North Potomac, all part of the Washington, DC metropolitan area.
For businesses at this location, mail can be addressed either to a PO Box or to the Firstfield Road street address with a unit number. Both formats work because this isn't a PO Box Only Zone. The ZIP was classified as a PO Box type before October 2004, but actual street delivery exists through a city carrier route.
Only one street exists in this ZIP: Firstfield Road, serving a multi-tenant business complex with unit designators.
ZIP Code 20885 supports both business and residential activity. According to the Business Census (2024), there are 3 business establishments, employing about 88 people with an annual payroll of $9,970,000.
| # Residential Mailboxes: | 0Source: USPS |
| # Business Mailboxes: | 0Source: USPS |
| Total Delivery Receptacles: | 236Source: USPS |
| Single Family Delivery Units: | 0Source: USPS |
| Multi Family Delivery Units: | 0Source: USPS |
| # of Businesses: | 3Source: CBP |
| 1st Quarter Payroll: | $3,040,000Source: CBP |
| Annual Payroll: | $9,970,000Source: CBP |
| # of Employees: | 88Source: CBP |
ZIP Code 20885 is located in Montgomery County, Maryland, within the Washington-Arlington-Alexandria, DC-VA-MD-WV Metropolitan Statistical Area (CBSA 47900) and Maryland's 6th Congressional District. This Metro area has a population of 5,582,170 people, about 0.00% of whom live in ZIP Code 20885, 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: | 06Source: USPS |
| Congressional Land Area: | 1950.26 sq miSource: Census |
| PMSA: | Washington, DC-MD-VA-WV PMSASource: Census |
| Intro Date: | < 2004-10Source: ZIP-Codes.com |
| Place FIPS Code: | 2431175Source: Census |
| Place Name: | Gaithersburg city; MarylandSource: Census |
We could not locate which school district 20885 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.