ZIP code · Sunderland · Maryland · United States
ZIP code 20689 — Sunderland
ZIP code 20689 serves Sunderland, Maryland.
- Postal code
- 20689Single source Value from one source, not cross-checked.
- City
- Sunderland
- County
- Calvert FIPS 24009
- State
- Maryland
- Country
- United States
- Coordinates
- 38.6490, -76.5767 — precision precise (locality)
View on OpenStreetMap - Population
- 2,046 (ZCTA, ACS 5-year)
- Population density
- 265 / sq mi
- Land area
- 7.7 sq mi (20 km²) (ZCTA, ACS 5-year)
- Median household income
- $174,583
- Per-capita income
- $64,525
- Median age
- 47.1
- Households
- 635
- Housing units
- 635
- Median home value
- $468,400
- Median gross rent
- $1,805 / month
- Congressional district
- MD-5 (119th Congress)
- USDA hardiness zone
- 7b (5 to 10 °F)Planting / growing zone from the 2023 USDA Plant Hardiness Zone Map: average annual extreme minimum temperature, 1991–2020.
- Time zone
- America/New_York (UTC−5 / UTC−4 DST)
Tools: compare 20689 with another ZIP · ZIPs within 25 miles · distance from 20689
Map of ZIP code 20689
Climate — monthly normals
Warmest month Jul (avg high 85°F), coldest Jan (avg low 25°F).
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high °F | 44 | 48 | 56 | 67 | 74 | 82 | 85 | 83 | 77 | 66 | 57 | 48 |
| Avg low °F | 25 | 26 | 33 | 43 | 52 | 61 | 66 | 64 | 58 | 46 | 36 | 29 |
| Precip in | 3.3 | 3.0 | 4.2 | 3.3 | 4.3 | 4.2 | 4.6 | 4.8 | 4.9 | 4.2 | 3.3 | 4.0 |
NOAA 1991–2020 climate normals from the nearest station: MECHANICSVILLE 5 NE (13.5 mi) · NOAA NCEI
Places in ZIP 20689
- 1 schools
- 1 restaurants & cafés
- 2 playgrounds
- 4 places of worship
- 1 gas stations
Places mapped inside this ZIP’s ZCTA area in OpenStreetMap. OSM is community-maintained: counts reflect what has been mapped, and completeness varies by area — treat them as at-least figures. © OpenStreetMap contributors (ODbL) · Methodology
About this page
US ZIP codes have five digits. They are postal routing areas, not administrative boundaries: a ZIP can span more than one city or county, and the city shown is the primary USPS name for that code.
GeoNames · U.S. Census Bureau (ACS) · U.S. Census Bureau · NOAA NCEI · usda-phzm. Data generated on 2026-08-21. Methodology · Report an error on this page