ZIP code 55609
Where is ZIP code 55609?
Knife River, Minnesota
Lake County · PO Box only ZIP code
ZIP code 55609 belongs to Knife River, Minnesota in Lake County. 55609 is a PO Box only ZIP code: it is used for post office boxes at the Knife River post office, not for street addresses. It is in the Central Time zone and uses area code 218. About 131 people live in the 55609 area, where the median household income is $78,208. The closest ZIP codes are 55616 (Two Harbors, 7.5 mi northeast), 55804 (Duluth, 12.8 mi southwest) and 55803 (Duluth, 15.9 mi west).
| ZIP code | 55609 |
|---|---|
| Type | PO Box only (no street delivery) |
| Status | Active |
| City | Knife River |
| State | Minnesota (MN) |
| County | Lake County |
| Time zone | Central Time · now |
| Area code | 218 |
| Coordinates | 46.9539, -91.778 map |
| 3-digit prefix | 556 |
Population and income in 55609
| Population | 131 · lower than 96% of Minnesota ZIP codes |
|---|---|
| People per square mile | 53 · higher than 63% of Minnesota ZIP codes |
| Median age | 87.7 years · higher than 100% of Minnesota ZIP codes |
| Men / women | 56% / 44% |
| Median household income | $78,208 · higher than 51% of Minnesota ZIP codes |
| Income per person | $37,484 |
| Below the poverty line | 11% |
| Bachelor’s degree or higher | 48% of adults 25+ |
| Housing units | 127 |
| Households | 75 (1.75 people on average) |
| Owners / renters | 100% / 0.0% |
| Land area | 2.49 sq mi (plus 0.02 sq mi of water) |
Source: U.S. Census Bureau, American Community Survey 5-year estimates (2020–2024) for ZIP Code Tabulation Area 55609. Census ZIP areas are close to, but not exactly the same as, USPS delivery areas.
ZIP codes near 55609
| ZIP code | City | Distance | Type |
|---|---|---|---|
| 55616 | Two Harbors, MN | 7.5 mi NE | Standard |
| 55804 | Duluth, MN | 12.8 mi SW | Standard |
| 55803 | Duluth, MN | 15.9 mi W | Standard |
| 55812 | Duluth, MN | 17.2 mi SW | Standard |
| 55805 | Duluth, MN | 18.4 mi SW | Standard |
| 55802 | Duluth, MN | 19.4 mi SW | Standard |
| 55801 | Duluth, MN | 19.5 mi SW | PO Box only |
| 55814 | Duluth, MN | 19.5 mi SW | PO Box only |
| 55815 | Duluth, MN | 19.5 mi SW | PO Box only |
| 55816 | Duluth, MN | 19.5 mi SW | PO Box only |
| 55806 | Duluth, MN | 20.8 mi SW | Standard |
| 55811 | Duluth, MN | 22.1 mi SW | Standard |
Straight-line distance between ZIP code center points. Find every ZIP code within 10 miles of 55609 or measure the distance to another ZIP code.
How to address mail to 55609
PO BOX 123
KNIFE RIVER MN 55609
Put the city, the two-letter state code and the ZIP code on the last line. Adding the 4-digit ZIP+4 code (55609-XXXX) helps mail sort faster but isn’t required.
Questions
- What city is ZIP code 55609?
- 55609 is a Knife River, Minnesota ZIP code.
- What county is 55609 in?
- ZIP code 55609 is in Lake County, Minnesota.
- What time zone is ZIP code 55609 in?
- 55609 is in the Central Time zone (America/Chicago).
- What area code is 55609?
- Phone numbers in ZIP code 55609 use area code 218.
- What is the population of ZIP code 55609?
- About 131 people live in ZIP code 55609, according to the Census Bureau’s American Community Survey (2020–2024).
- What is the median income in 55609?
- The median household income in 55609 is $78,208 a year, higher than 51% of Minnesota ZIP codes.
- Can I use 55609 for a street address?
- No. 55609 is only for PO Boxes. Street addresses in Knife River use another ZIP code.
- What ZIP codes are near 55609?
- The nearest ZIP codes to 55609 are 55616 (Two Harbors, 7.5 miles), 55804 (Duluth, 12.8 miles), 55803 (Duluth, 15.9 miles) and 55812 (Duluth, 17.2 miles).