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

46556 (Notre Dame), at 14.3%, among 21 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. Joseph County, IN

These are the 21 ZIP codes in St. Joseph County with the fastest population growth, out of 21 with at least 1,000 residents. 46556 (Notre Dame, 14.3%), 46616 (South Bend, 9.6%) and 46613 (South Bend, 8.4%) lead the list. There is no single "best" ZIP code in St. Joseph 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. Joseph County

Rank	ZIP	Mailing city	Population change	Residents	Households	Residential mailboxes
1	46556	Notre Dame	14.3%	8,344	283	—
2	46616	South Bend	9.6%	5,979	2,501	2,577
3	46613	South Bend	8.4%	12,279	4,244	4,222
4	46545	Mishawaka	7.8%	26,606	11,878	12,617
5	46628	South Bend	4.9%	27,685	10,787	11,153
6	46617	South Bend	3.5%	10,032	4,465	5,064
7	46615	South Bend	3.4%	14,190	6,337	6,671
8	46573	Wakarusa	3.3%	3,936	1,323	1,222
9	46506	Bremen	3.0%	9,994	3,562	3,955
10	46561	Osceola	2.8%	13,996	5,112	5,437
11	46552	New Carlisle	2.0%	7,047	2,602	2,193
12	46619	South Bend	1.2%	21,729	7,858	—
13	46637	South Bend	0.7%	16,200	7,442	—
14	46635	South Bend	0.7%	6,410	2,718	—
15	46530	Granger	-0.8%	31,598	11,505	12,419
16	46544	Mishawaka	-2.8%	31,077	12,839	14,559
17	46614	South Bend	-4.6%	29,602	12,206	13,227
18	46536	Lakeville	-7.6%	2,964	1,222	1,149
19	46554	North Liberty	-9.7%	4,405	1,651	1,354
20	46601	South Bend	-16.0%	4,800	2,066	2,576
21	46574	Walkerton	-21.3%	7,426	3,214	3,590

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; 21 of 23 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 29,693 households. Open any of them on the route map to see each carrier route's own figures before you choose.

Open 46556 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. Joseph County has the fastest population growth?: 46556 (Notre Dame), at 14.3%, among 21 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.