Illinois State Facts
There are fewer men than woman in Illinois. The overall gender ratio is 96 men to 100 women.
The Illinois flag was adopted on June 27, 1969. The flag has been ranked the 34th best U.S. flag by a leading Vexillology Organization.
The Illinois quarter was the 21st quarter released overall. The quarter was released on January 2, 2003.
Recent estimates put Illinois's population at around 12,881,000 people (5th out of 56).The population density is 232.0 people per square mile (18th out of 56).
Someone from Illinois is known as a Illinoisan. View our List of Adjectival and Demonyms for all the States.
Illinois was the 21st state when it joined the United States on December 3, 1818. Prior to 1818, Illinois was known as "Illinois Territory."
Essential Illinois Facts
Postal CodeThe Illinois postal code is IL. This abbreviation has been used since the USPS first established official codes in October 1963.
Gender RatioGender Ratio: 96 Men to 100 Women
Male Population: 6,320,886 men
Female Population: 6,559,694 women
State FlagThe 7 main colors in the Illinois flag are #FFFFFF, #785A3C, #BE0A2F, #FFE60F, #B4B4B4, #000000, and #002768
Population and AreaPopulation: 12,880,580 people
Land Area: 55,519 square miles
Population Density: 12,880,580 people per square mile
Areas Codes in Illinois (0)
Illinois Counties (0)