Alton, NH ZIP code
The ZIP code for Alton, New Hampshire is 03809. It is in Belknap County.
- Population in these ZIPs
- 3,680
- Avg. median income
- $106,400population-weighted
- Typical home value
- $530,400population-weighted
- Metro area
- Laconia, NH
Loading map…
Click anywhere on the map to see which ZIP code it's in.
Alton, NH ZIP code list
| ZIP code | Population | Median income | Typical home value |
|---|---|---|---|
| 03809 | 3,680 | $106,397 | $530,400 |
Population and median household income: ACS 2020–2024 5-year estimates. Typical home value: Zillow Home Value Index (September 2026) where available, otherwise the ACS median owner-reported value. "PO Box" marks ZIP codes with no delivery area of their own. Methodology
Cities near Alton
- New Durham 2 mi
- Alton Bay 6 mi
- Union 7 mi
- Center Barnstead 7 mi
- Gilmanton Iron Works 7 mi
- Milton 9 mi
- Barnstead 10 mi
- Gilford 10 mi
- Farmington 10 mi
- Gilmanton 10 mi
- Wolfeboro 10 mi
- Sanbornville 11 mi
Frequently asked questions
What is the ZIP code for Alton, NH?
The ZIP code for Alton, NH is 03809.
What county is Alton, New Hampshire in?
Alton ZIP codes are in Belknap County.