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City ZIP codes · Maryland

Rockville, MD ZIP Codes

8 ZIP codes use the postal name Rockville, Maryland (Census 2020 ZCTAs and GeoNames postal codes, October 2026): 4 residential and 4 for PO boxes or a single organization. Median household income runs from $122,472 in 20852 to $159,080 in 20853, 1.3 times as much (Census Bureau, ACS 2020-2024). Rockville's most populous ZIP code is 20850, with 50,353 people (ACS 2020-2024); 54% of its land is in the city of Rockville.

  • ACS2020-24
  • Census2020
  • GeoNames2026

Where are Rockville's ZIP codes?

20850: $126k median household income20851: $126k median household income20852: $123k median household income20853: $159k median household income2085020853208522085120850: $126k median household income20851: $126k median household income20852: $123k median household income20853: $159k median household income2085020853208522085120850: $126k median household income20851: $126k median household income20852: $123k median household income20853: $159k median household income20850208532085220851
The 4 residential ZIP codes named Rockville, shaded by median household income in national fifths (ACS 2020-2024). Select a ZIP to open it. <$54.1k$98.1k+no figure

Source: U.S. Census Bureau, 2020 ZCTA cartographic boundaries; ACS 2020-2024 5-year estimates (B19013).

How different are Rockville's ZIP codes?

The highest median household income is in 20853 ($159,080), the lowest in 20852 ($122,472). Home values run from $568,900 in 20851 to $714,400 in 20850.

Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B19013, B25077, B01003).

All 4 residential ZIP codes of Rockville

Residential ZIP codes with the postal name Rockville, MD, largest first (ACS 2020-2024); sort by any column
County
20850 Montgomery County 50,353 3,567 $126k $714k
20852 Montgomery County 48,180 5,967 $123k $665k
20853 Montgomery County 31,851 3,527 $159k $632k
20851 Montgomery County 14,946 5,894 $126k $569k

Download the 8 ZIP codes as CSV

Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates; 2023 Gazetteer land areas (2020 ZCTAs); town names from simplemaps US ZIP Codes (CC BY 4.0) and GeoNames (CC BY 4.0).

PO Box and single-organization ZIP codes in Rockville

4 ZIP codes named Rockville have no residential delivery area: post office boxes, or one organization (a large employer, an agency, a university) with its own code. The Census Bureau publishes no figures for them.

Rockville, MD: ZIP codes without a residential area, for PO boxes or one organization (GeoNames postal codes; USPS does not publish openly which is which)
ZIPCounty
20847Montgomery County
20848Montgomery County
20849Montgomery County
20857Montgomery County

Source: GeoNames postal codes (CC BY 4.0); a ZIP code with no Census ZCTA has no residential delivery area.

Which counties do Rockville's ZIP codes reach?

Rockville's residential ZIP codes lie in Montgomery County.

Which places do Rockville's ZIP codes cover?

A postal name is not a city limit. By the Census Bureau's places, Rockville's residential ZIP codes cover Rockville itself and 5 other places, each listed with the ZIP codes that have at least 5% of their land in it or hold most of the place:

  • Aspen Hill census-designated 20851, 20853
  • North Bethesda census-designated 20851, 20852
  • North Potomac census-designated 20850
  • Olney census-designated 20853
  • Travilah census-designated 20850

Source: U.S. Census Bureau, 2020 ZCTA-to-place relationship file (shares of land).

Which first three digits do Rockville's ZIP codes use?

The first three digits of a ZIP code name the sectional center, the mail processing plant that sorts it. Every ZIP code of Rockville starts with 208.

Three-digit prefixes of Rockville's ZIP codes, the sectional center for each (USPS labeling list L005, effective October 1, 2026) and how many of the prefix's codes are Rockville's
PrefixSectional centerHereAll codes
208 Suburban, MD (SCF 208) 8 59

Source: U.S. Postal Service, labeling list L005 (3-digit ZIP Code prefix groups, SCF sortation), effective October 1, 2026.