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Welcome to Illinoi ...

Illinoi is located in Lake County<1>.

While we don't have a date for the founding of Illinoi, you might consider that their post office opened  in 1900.

The origin (or the toponymy) of Illinoi: The name Illinoi is a portmanteau<2> and it reflects the fact that the community is located on the Illinois and Indiana border.

Illinoi is 620 feet [189 m] above sea level.<3>.

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

Note: If you travel south from Illinoi (for example, toward Earl Park), you will leave Central Time and cross into the Eastern Time Zone (EST/EDT).

Area Code for Illinoi: 219

Communities Also Named Illinoi ...

Using our Gazetteer, we found another community named Illinoi - it's located in Illinois.

For more information, see our Tidbits & Trivia Page for Illinoi.

Communities near Illinoi ...

We have created a list of 10 communities that are near Illinoi.

  • Crown Point
    (17 miles [27.4 km] to the northeast)
  • Kankakee
    (18 miles [29 km] to the west)
  • Saint John
    (18 miles [29 km] to the north)
  • Bourbonnais
    (18 miles [29 km] to the west)
    • Note: The GPS coordinates that we are using for Bourbonnais have been provided by the GNIS.<5> The coordinates still need to be verified.
    • Jump to our Gazetteer entry for Bourbonnais
    • Bourbonnais is located in Kankakee County (IL)
    • Population from the 2020 Census: 19,378 people
    • Jump to TripAdvisor's Tourism page for Bourbonnais <4>
  • Bradley
    (16 miles [25.7 km] to the west)
    • Note: The GPS coordinates that we are using for Bradley have been provided by the GNIS.<5> The coordinates still need to be verified.
    • Jump to our Gazetteer entry for Bradley
    • Bradley is located in Kankakee County (IL)
    • Population from the 2020 Census: 15,132 people
    • Jump to TripAdvisor's Tourism page for Bradley <4>
  • Cedar Lake
    (13 miles [20.9 km] to the north)
    • Note: The GPS coordinates that we are using for Cedar Lake have been provided by the GNIS.<5> The coordinates still need to be verified.
    • Jump to our Gazetteer entry for Cedar Lake
    • Cedar Lake is located in Lake County
    • Population from the 2020 Census: 13,588 people
    • Jump to TripAdvisor's Tourism page for Cedar Lake <4>
  • Lowell
    (9 miles [14.5 km] to the northeast)
    • Note: The GPS coordinates that we are using for Lowell have been provided by the GNIS.<5> The coordinates still need to be verified.
    • Jump to our Gazetteer entry for Lowell
    • Lowell is located in Lake County
    • Population from the 2020 Census: 10,137 people
    • Jump to TripAdvisor's Tourism page for Lowell <4>
  • Manteno
    (17 miles [27.4 km] to the west)
    • Note: The GPS coordinates that we are using for Manteno have been provided by the GNIS.<5> The coordinates still need to be verified.
    • Jump to our Gazetteer entry for Manteno
    • Manteno is located in Kankakee County (IL)
    • Population from the 2020 Census: 8,892 people
    • Jump to TripAdvisor's Tourism page for Manteno <4>
  • Crete
    (18 miles [29 km] to the north)
    • Note: The GPS coordinates that we are using for Crete have been provided by the GNIS.<5> The coordinates still need to be verified.
    • Jump to our Gazetteer entry for Crete
    • Crete is located in Will County (IL)
    • Population from the 2020 Census: 7,938 people
    • Jump to TripAdvisor's Tourism page for Crete <4>
  • Monee
    (19 miles [30.6 km] to the northwest)

To Help With Your Genealogy Research ...

We have a couple of sections for those tracing their genealogy.

We created a list of cemeteries that are in the area around Illinoi. Our list includes the location of those cemeteries and we provide an overhead view. See our Cemetery List for Illinoi.

Using the information from an 1895 Atlas, we've created a list of communities that were in the area of Illinoi. Our list includes information such as whether the 1895 community had a post office or railroad service. See our List of 1890's Communities around Illinoi.

We also have a detailed list of newspapers that have been published in the area around Illinoi. See our Newspapers Page for Illinoi.

TripAdvisor Tourism Pages for Illinoi ...

Looking for more information about Illinoi? A wonderful source is the TripAdvisor website. We always start with the TripAdvisor Tourism page, where you can read an overview with links that will help you find lodging, restaurants and attractions.

While we are unaware of a Tourism page that is specific to Illinoi, there are neighboring communities that do have Tourism pages. A map of those communities can be found with our TripAdvisor Page for Illinoi.

Adding Illinoi to Our Gazetteer ...

We originally found mention of Illinoi in both the FIPS-55 and the GNIS. For more information, see the FIPS and GNIS Codes sections on our Miscellaneous Page.

From our notes, the earliest published mention we've found for Illinoi was in the document titled List of Post Offices from Cameron Blevins and Richard Helbock.<6>

X2X - From that list, the Illinoi post office opened in 1900.

For more details, see References and Mentions for Illinoi.

Unfortunately, we don't know of a website for Illinoi. If you can help, please contact us through our Feedback Page.

The official website for Lake County: www.lakecountyin.org/

The official website for State of Indiana: https://www.in.gov

Footnotes ...

<1>If you're interested in how the shape of Indiana's counties, including Lake, have changed over time, we recommend the Atlas of Historical County Boundaries.
<2>A portmanteau (such as Illinoi) is the combination or contraction of two (or more) words, their sound and the meaning of those words to create a new word. For example, smoke and fog becomes smog.
<3>The elevation is an estimate for the area around Illinoi - it will be higher in some places and lower in others.
<4>While we're fans and frequent users of TripAdvisor, you should know that we're also members of the TripAdvisor affiliate program.
<5>The location has been supplied by the Geographic Names Information System - which is maintained by the U.S. Geological Survey (USGS). While these values should be definitive, we found that accuracy can vary and you should double-check the location if accuracy is required.
<6>A copy of their list with background information can be found at:

      https://cblevins.github.io/us-post-offices/data-biography/




 

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This page was last modified/updated: 21 Apr 2025