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Welcome to DeKalb County ...

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

The community of Sycamore is the Seat for DeKalb County.

DeKalb County was founded in 1837 and was created by taking area from Kane County.

From the Census Estimates for 2019, <1> DeKalb had a population of 104,897 people. This is a decrease of 0.24% since the last Census (which gave a population of 105,145 people in 2010).

At the time of the 2010 Census, DeKalb represented 0.82% of the total population of Illinois.

Below are some of the communities located in DeKalb County:

  • Cortland
    (3 miles [4.8 km] to the northeast)
  • De Kalb
    (2 miles [3.2 km] to the north)
    • De Kalb is located in DeKalb County (IL)
    • Jump to our Gazetteer entry for De Kalb
    • Population from the 2020 Census: 42,621 people
    • Jump to TripAdvisor's Tourism page for De Kalb <2>
  • Genoa
    (13 miles [20.9 km] to the north)
    • Genoa is located in DeKalb County (IL)
    • Jump to our Gazetteer entry for Genoa
    • Population from the 2020 Census: 5,251 people
    • Jump to TripAdvisor's Tourism page for Genoa <2>
  • Hinckley
    (10 miles [16.1 km] to the southeast)
  • Kingston
    (14 miles [22.5 km] to the north)
  • Kirkland
    (14 miles [22.5 km] to the northwest)
  • Malta
    (6 miles [9.7 km] to the west)
    • Malta is located in DeKalb County (IL)
    • Jump to our Gazetteer entry for Malta
    • Population from the 2020 Census: 1,161 people
    • Jump to TripAdvisor's Tourism page for Malta <2>
  • Sandwich
    (18 miles [29 km] to the south)
  • Continue List   (4 more) ...
    • Shabbona
      (11 miles [17.7 km] to the southwest)
    • Somonauk
      (18 miles [29 km] to the south)
    • Sycamore
      (6 miles [9.7 km] to the northeast)
      • Sycamore is located in DeKalb County (IL)
      • Jump to our Gazetteer entry for Sycamore
      • Population from the 2020 Census: 18,317 people
    • Waterman
      (8 miles [12.9 km] to the south)

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.