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

60447 (Minooka), at 33.6 (±2.0), 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 Grundy County, IL

These are the 9 ZIP codes in Grundy County with the lowest median age, out of 9 with at least 1,000 residents. 60447 (Minooka, 33.6), 60410 (Channahon, 37.1) and 60444 (Mazon, 37.2) lead the list. There is no single "best" ZIP code in Grundy 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 Grundy County

Rank	ZIP	Mailing city	Median age	Residents	Households	Residential mailboxes
1	60447	Minooka	33.6 ±2.0	16,102	5,321	5,129
2	60410	Channahon	37.1 ±3.6	14,239	4,679	5,219
3	60444	Mazon	37.2 ±5.0	1,901	703	406
4	60424	Gardner	37.5 ±4.9	2,153	812	864
5	61360	Seneca	37.9 ±10.2	3,610	1,363	1,032
6	60407	Braceville	39.2 ±6.6	1,812	649	574
7	60420	Dwight	39.3 ±5.9	4,682	1,901	2,134
8	60450	Morris	40.7 ±1.8	20,783	8,741	8,883
9	60416	Coal City	42.2 ±3.2	9,550	3,824	3,928

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 12 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 12,878 households, on 22 carrier routes with 12,650 residential mailboxes. Open any of them on the route map to see each carrier route's own figures before you choose.

Open 60447 on the EDDM route map

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Frequently asked questions

Which ZIP code in Grundy County has the lowest median age?: 60447 (Minooka), at 33.6 (±2.0), 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.