Which ZIP code in DeKalb County has the fastest population growth?

60531 (Leland), at 5.2%, among 14 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 DeKalb County, IL

These are the 14 ZIP codes in DeKalb County with the fastest population growth, out of 14 with at least 1,000 residents. 60531 (Leland, 5.2%), 60112 (Cortland, 4.5%) and 60520 (Hinckley, 4.3%) lead the list. There is no single "best" ZIP code in DeKalb 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 DeKalb County

Rank	ZIP	Mailing city	Population change	Residents	Households	Residential mailboxes
1	60531	Leland	5.2%	1,885	724	547
2	60112	Cortland	4.5%	4,621	1,599	1,748
3	60520	Hinckley	4.3%	2,979	1,123	1,055
4	60135	Genoa	3.1%	7,274	2,901	2,841
5	60556	Waterman	0.7%	2,138	719	733
6	60178	Sycamore	-0.7%	22,224	8,735	9,583
7	60146	Kirkland	-0.9%	2,369	968	616
8	60552	Somonauk	-1.4%	4,285	1,807	1,557
9	60548	Sandwich	-2.8%	11,721	4,548	5,002
10	60151	Maple Park	-4.6%	3,888	1,437	1,520
11	60115	Dekalb	-6.0%	42,536	17,262	17,358
12	60150	Malta	-10.1%	1,738	591	479
13	60145	Kingston	-10.6%	2,464	900	878
14	60518	Earlville	-11.5%	3,289	1,465	1,255

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; 14 of 18 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 7,066 households, on 15 carrier routes with 6,924 residential mailboxes. Open any of them on the route map to see each carrier route's own figures before you choose.

Open 60531 on the EDDM route map

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Frequently asked questions

Which ZIP code in DeKalb County has the fastest population growth?: 60531 (Leland), at 5.2%, among 14 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.