Which ZIP code in Isanti County has the lowest median age?

55070 (Saint Francis), at 35.1 (±2.3), among 9 ZIP codes with at least 1,000 residents.

Why are some ZIP codes missing?

ZIP codes with fewer than 1,000 residents are left out because their survey estimates swing too much to rank, and so are ZIP codes where the Census Bureau did not publish this figure.

Youngest ZIP codes in Isanti County, MN

These are the 9 ZIP codes in Isanti County with the lowest median age, out of 9 with at least 1,000 residents. 55070 (Saint Francis, 35.1), 55398 (Zimmerman, 36.4) and 55040 (Isanti, 38.7) lead the list. There is no single "best" ZIP code in Isanti County; the right one depends on who you want to reach, so the same ZIP codes are ranked several ways below.

Youngest ZIP codes in Isanti County

Rank	ZIP	Mailing city	Median age	Residents	Households	Residential mailboxes
1	55070	Saint Francis	35.1 ±2.3	8,441	2,999	3,268
2	55398	Zimmerman	36.4 ±2.4	17,688	6,202	6,877
3	55040	Isanti	38.7 ±2.3	14,837	5,408	5,820
4	55371	Princeton	39.3 ±1.3	18,103	6,440	—
5	55008	Cambridge	40.1 ±1.9	16,729	6,878	7,628
6	55080	Stanchfield	40.5 ±3.5	3,180	1,155	1,178
7	55006	Braham	40.7 ±3.4	3,694	1,496	1,562
8	55056	North Branch	41.1 ±2.8	14,753	5,886	6,196
9	55079	Stacy	42.0 ±3.3	8,508	3,131	—

How we ranked them

Ranked by median age of all residents, lowest first (ACS 5-year estimates, 2020–2024). ZIP codes need at least 1,000 residents to be ranked; 9 of 11 qualify.

Which of these to mail, and why

Younger ZIP codes skew toward renters, students and young families: fitness, quick-service food, apartments, entertainment and first-time-buyer offers.

The top five ZIP codes on this list hold 27,927 households. Open any of them on the route map to see each carrier route's own figures before you choose.

Open 55070 on the EDDM route map

More rankings

Businesses that mail these ZIP codes

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EDDM guides

Frequently asked questions

Which ZIP code in Isanti County has the lowest median age?: 55070 (Saint Francis), at 35.1 (±2.3), among 9 ZIP codes with at least 1,000 residents.
How is this ranking calculated?: Ranked by median age of all residents, lowest first (ACS 5-year estimates, 2020–2024).
Why are some ZIP codes missing?: ZIP codes with fewer than 1,000 residents are left out because their survey estimates swing too much to rank, and so are ZIP codes where the Census Bureau did not publish this figure.

This product uses the Census Bureau Data API but is not endorsed or certified by the Census Bureau.