When is Illinois' Birthday?

The admission date and birthdate of Illinois.

We here at Research Maniacs consider Illinois' birthdate to be the day Illinois joined the Union. In other words, Illinois' birthday is the date of statehood for Illinois.

The admission date and therefore the birthdate of Illinois is:

December 3, 1818.

You may also be interested to know that Illinois is the 21st state to be admitted to the Union.

Do you know what day of the week Illinois was born? We have made a calendar for 1818 so you can find out.

Anyway, if this is December 3, then this is Illinois' Birthday. Happy Birthday Illinois!

On the left, you see the Illinois Commemorative Quarter showing 1818, which is the year Illinois became part of the United States of America.

State Birthdays
See birthdays for other states here.

What is Illinois' abbreviation?

How many electoral votes does Illinois have?

What is the largest city in Illinois?

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