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Welcome to McHenry County ...

Time Zone: McHenry County lies in the Central Time Zone (CST/CDT) and observes daylight saving time.

The community of Woodstock is the Seat for McHenry County.

McHenry County was founded in 1836 and was created by taking area from Cook County.

From the Census Estimates for 2019, <1> McHenry had a population of 307,774 people. This is a decrease of 0.43% since the last Census (which gave a population of 309,112 people in 2010).

At the time of the 2010 Census, McHenry represented 2.41% of the total population of Illinois.

Below are some of the communities located in McHenry County:

  • Algonquin
    (9 miles [14.5 km] to the south)
  • Bull Valley
    (Less than 2 miles to the northeast)
    • Bull Valley is located in McHenry County (IL)
    • Jump to our Gazetteer entry for Bull Valley
    • Population from the 2020 Census: 1,078 people
  • Cary
    (7 miles [11.3 km] to the southeast)
    • Cary is located in McHenry County (IL)
    • Jump to our Gazetteer entry for Cary
    • Population from the 2020 Census: 17,929 people
    • Jump to TripAdvisor's Tourism page for Cary <2>
  • Crystal Lake
    (4 miles [6.4 km] to the south)
  • Fox River Grove
    (9 miles [14.5 km] to the southeast)
  • Greenwood
    (6 miles [9.7 km] to the north)
    • Greenwood is located in McHenry County (IL)
    • Jump to our Gazetteer entry for Greenwood
    • Population from the 2020 Census: 224 people
  • Harvard
    (16 miles [25.7 km] to the northwest)
    • Harvard is located in McHenry County (IL)
    • Jump to our Gazetteer entry for Harvard
    • Population from the 2020 Census: 8,979 people
    • Jump to TripAdvisor's Tourism page for Harvard <2>
  • Hebron
    (12 miles [19.3 km] to the north)
    • Hebron is located in McHenry County (IL)
    • Jump to our Gazetteer entry for Hebron
    • Population from the 2020 Census: 1,175 people
    • Jump to TripAdvisor's Tourism page for Hebron <2>
  • Continue List   (19 more) ...
    • Holiday Hills
      (6 miles [9.7 km] to the east)
      • Holiday Hills is located in McHenry County (IL)
      • Jump to our Gazetteer entry for Holiday Hills
      • Population from the 2020 Census: 574 people
    • Huntley
      (10 miles [16.1 km] to the southwest)
      • Huntley is located in McHenry County (IL)
      • Jump to our Gazetteer entry for Huntley
      • Population from the 2020 Census: 27,256 people
      • Jump to TripAdvisor's Tourism page for Huntley <2>
    • Island Lake
      (7 miles [11.3 km] to the east)
      • Island Lake is located in McHenry County (IL)
      • Jump to our Gazetteer entry for Island Lake
      • Population from the 2020 Census: 7,951 people
    • Johnsburg
      (8 miles [12.9 km] to the northeast)
    • Lake-in-the-Hills
      (8 miles [12.9 km] to the south)
    • Lakemoor
      (8 miles [12.9 km] to the east)
      • Lakemoor is located in McHenry County (IL)
      • Jump to our Gazetteer entry for Lakemoor
      • Population from the 2020 Census: 5,912 people
      • Jump to TripAdvisor's Tourism page for Lakemoor <2>
    • Lakewood
      (5 miles [8 km] to the south)
      • Lakewood is located in McHenry County (IL)
      • Jump to our Gazetteer entry for Lakewood
      • Population from the 2020 Census: 3,967 people
      • Jump to TripAdvisor's Tourism page for Lakewood <2>
    • Marengo
      (13 miles [20.9 km] to the west)
      • Marengo is located in McHenry County (IL)
      • Jump to our Gazetteer entry for Marengo
      • Population from the 2020 Census: 7,377 people
      • Jump to TripAdvisor's Tourism page for Marengo <2>
    • McCullom Lake
      (5 miles [8 km] to the northeast)
      • McCullom Lake is located in McHenry County (IL)
      • Jump to our Gazetteer entry for McCullom Lake
      • Population from the 2020 Census: 996 people
    • McHenry
      (4 miles [6.4 km] to the northeast)
      • McHenry is located in McHenry County (IL)
      • Jump to our Gazetteer entry for McHenry
      • Population from the 2020 Census: 27,100 people
      • Jump to TripAdvisor's Tourism page for McHenry <2>
    • Oakwood Hills
      (6 miles [9.7 km] to the southeast)
      • Oakwood Hills is located in McHenry County (IL)
      • Jump to our Gazetteer entry for Oakwood Hills
      • Population from the 2020 Census: 2,011 people
    • Prairie Grove
      (4 miles [6.4 km] to the east)
      • Prairie Grove is located in McHenry County (IL)
      • Jump to our Gazetteer entry for Prairie Grove
      • Population from the 2020 Census: 1,920 people
    • Richmond
      (12 miles [19.3 km] to the north)
      • Richmond is located in McHenry County (IL)
      • Jump to our Gazetteer entry for Richmond
      • Population from the 2020 Census: 1,896 people
      • Jump to TripAdvisor's Tourism page for Richmond <2>
    • Ringwood
      (7 miles [11.3 km] to the northeast)
    • Spring Grove
      (11 miles [17.7 km] to the northeast)
    • Trout Valley
      (8 miles [12.9 km] to the southeast)
      • Trout Valley is located in McHenry County (IL)
      • Jump to our Gazetteer entry for Trout Valley
      • Population from the 2020 Census: 508 people
    • Union
      (10 miles [16.1 km] to the southwest)
      • Union is located in McHenry County (IL)
      • Jump to our Gazetteer entry for Union
      • Population from the 2020 Census: 548 people
      • Jump to TripAdvisor's Tourism page for Union <2>
    • Wonder Lake
      (6 miles [9.7 km] to the north)
      • Wonder Lake is located in McHenry County (IL)
      • Jump to our Gazetteer entry for Wonder Lake
      • Population from the 2020 Census: 3,837 people
      • Wonder Lake has also been known as:
      • Wonder Lake village
      • Jump to TripAdvisor's Tourism page for Wonder Lake <2>
    • Woodstock
      (4 miles [6.4 km] to the west)

Websites of Interest ...

Footnotes ...

<1>On a yearly basis, the US Census Bureau creates an estimate of the county's population. Keep in mind that this is an estimate and not an actual count. The last physical count was the 2010 Census and the next count will be for the 2020 Census.
<2>While we're fans and frequent users of TripAdvisor, you should know that we're also members of the TripAdvisor affiliate program.