ZIP code · Dennis · Massachusetts · United States
ZIP code 02638 — Dennis
ZIP code 02638 serves Dennis, Massachusetts.
- Postal code
- 02638Single source Value from one source, not cross-checked.
- City
- Dennis
- County
- Barnstable FIPS 25001
- State
- Massachusetts
- Country
- United States
- Coordinates
- 41.7322, -70.1911 — precision precise (locality)
View on OpenStreetMap - Population
- 3,256 (ZCTA, ACS 5-year)
- Population density
- 578 / sq mi
- Land area
- 5.6 sq mi (14.6 km²) (ZCTA, ACS 5-year)
- Median household income
- $117,619
- Per-capita income
- $64,893
- Median age
- 59.9
- Households
- 1,390
- Housing units
- 3,043
- Median home value
- $714,000
- Median gross rent
- $1,689 / month
- Congressional district
- MA-9 (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 02638 with another ZIP · ZIPs within 25 miles · distance from 02638
Map of ZIP code 02638
Climate — monthly normals
Warmest month Jul (avg high 78°F), coldest Feb (avg low 24°F).
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Avg high °F | 38 | 38 | 44 | 52 | 62 | 71 | 78 | 78 | 71 | 62 | 52 | 43 |
| Avg low °F | 25 | 24 | 30 | 39 | 48 | 58 | 65 | 64 | 57 | 47 | 37 | 30 |
| Precip in | 3.8 | 3.7 | 4.3 | 4.1 | 3.5 | 3.3 | 2.8 | 3.4 | 3.9 | 4.7 | 4.0 | 4.8 |
NOAA 1991–2020 climate normals from the nearest station: W HARWICH (6.2 mi) · NOAA NCEI
Places in ZIP 02638
- 5 restaurants & cafés
- 3 parks
- 1 playgrounds
- 2 libraries
- 1 places of worship
- 1 gas stations
- 1 police & fire 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