Which ZIP code in St. Louis County has the fastest population growth?

55805 (Duluth), at 11.1%, among 31 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.

Fastest-growing ZIP codes in St. Louis County, MN

These are the 25 ZIP codes in St. Louis County with the fastest population growth, out of 31 with at least 1,000 residents. 55805 (Duluth, 11.1%), 55768 (Mountain Iron, 10.8%) and 55806 (Duluth, 6.9%) lead the list. There is no single "best" ZIP code in St. Louis County; the right one depends on who you want to reach, so the same ZIP codes are ranked several ways below.

Fastest-growing ZIP codes in St. Louis County

Rank	ZIP	Mailing city	Population change	Residents	Households	Residential mailboxes
1	55805	Duluth	11.1%	10,602	4,984	—
2	55768	Mountain Iron	10.8%	2,964	1,323	1,139
3	55806	Duluth	6.9%	9,356	4,496	4,722
4	55804	Duluth	6.8%	15,922	6,303	6,484
5	55734	Eveleth	5.6%	6,265	2,783	2,954
6	55807	Duluth	4.4%	9,763	4,362	—
7	55713	Buhl	2.8%	1,048	457	—
8	55720	Cloquet	2.1%	17,448	7,154	7,313
9	55811	Duluth	0.6%	28,118	11,247	—
10	55710	Britt	0.4%	1,362	579	650
11	55779	Saginaw	0.3%	3,905	1,441	—
12	55810	Duluth	-0.1%	8,285	3,450	3,806
13	55736	Floodwood	-0.2%	1,344	605	435
14	55802	Duluth	-0.5%	2,399	1,301	1,884
15	55750	Hoyt Lakes	-0.5%	2,068	840	928
16	55746	Hibbing	-1.0%	16,730	8,089	8,177
17	55803	Duluth	-1.7%	17,662	7,528	—
18	56649	International Falls	-2.3%	8,825	4,413	—
19	55706	Babbitt	-2.5%	1,703	798	928
20	55808	Duluth	-2.7%	5,691	2,554	2,841
21	55792	Virginia	-2.8%	9,663	4,698	4,804
22	55705	Aurora	-3.9%	3,211	1,682	—
23	55732	Embarrass	-4.1%	1,453	676	653
24	55719	Chisholm	-5.2%	5,613	2,265	—
25	55812	Duluth	-5.5%	10,859	3,903	3,719

How we ranked them

Ranked by the change in ACS population estimates between the 2015–2019 and 2020–2024 releases. Both are 5-year averages, and ZIP code areas were redrawn for 2020, so a large change can partly reflect a boundary change. Both periods must have at least 1,000 residents. ZIP codes need at least 1,000 residents to be ranked; 31 of 48 qualify.

Which of these to mail, and why

Growing ZIP codes add households every year, which means new homes, new routes and customers without a go-to provider yet. Check the route map: new subdivisions can appear as new carrier routes.

The top five ZIP codes on this list hold 19,889 households. Open any of them on the route map to see each carrier route's own figures before you choose.

Open 55805 on the EDDM route map

More rankings

Businesses that mail these ZIP codes

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Frequently asked questions

Which ZIP code in St. Louis County has the fastest population growth?: 55805 (Duluth), at 11.1%, among 31 ZIP codes with at least 1,000 residents.
How is this ranking calculated?: Ranked by the change in ACS population estimates between the 2015–2019 and 2020–2024 releases. Both are 5-year averages, and ZIP code areas were redrawn for 2020, so a large change can partly reflect a boundary change. Both periods must have 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.

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