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

60033 (Harvard), at 33.7 (±4.3), among 18 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 McHenry County, IL

These are the 18 ZIP codes in McHenry County with the lowest median age, out of 18 with at least 1,000 residents. 60033 (Harvard, 33.7), 60156 (Lake In The Hills, 36.8) and 60097 (Wonder Lake, 36.9) lead the list. There is no single "best" ZIP code in McHenry 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 McHenry County

Rank	ZIP	Mailing city	Median age	Residents	Households	Residential mailboxes
1	60033	Harvard	33.7 ±4.3	12,999	4,697	5,044
2	60156	Lake In The Hills	36.8 ±0.8	28,800	9,692	10,275
3	60097	Wonder Lake	36.9 ±3.8	11,983	4,486	5,292
4	60152	Marengo	37.1 ±5.4	12,417	4,575	5,071
5	60042	Island Lake	39.4 ±2.3	8,347	3,088	3,432
6	60180	Union	39.7 ±25.0	1,831	704	646
7	60014	Crystal Lake	39.9 ±1.4	48,590	17,644	19,027
8	60013	Cary	40.2 ±1.4	26,694	9,892	9,845
9	60034	Hebron	40.9 ±6.2	2,033	703	807
10	60102	Algonquin	41.6 ±1.7	32,286	11,751	12,764
11	60098	Woodstock	42.2 ±1.6	33,130	13,168	13,058
12	60071	Richmond	42.6 ±5.2	3,851	1,843	1,789
13	60050	Mchenry	42.7 ±2.9	31,781	13,188	14,101
14	60081	Spring Grove	42.9 ±7.4	9,088	3,335	3,615
15	60012	Crystal Lake	43.5 ±1.7	12,368	4,220	4,513
16	60021	Fox River Grove	43.7 ±3.3	4,996	1,903	2,203
17	60051	Mchenry	44.5 ±1.7	24,621	10,054	10,708
18	60142	Huntley	49.6 ±1.9	29,692	12,891	13,499

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; 18 of 19 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 26,538 households, on 47 carrier routes with 29,114 residential mailboxes. Open any of them on the route map to see each carrier route's own figures before you choose.

Open 60033 on the EDDM route map

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Frequently asked questions

Which ZIP code in McHenry County has the lowest median age?: 60033 (Harvard), at 33.7 (±4.3), among 18 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.