What the numbers mean for dating in Illinois
Illinois holds about 12.5 million people, with an estimated 2.13 million women aged 18 to 44 — nearly 4% of the national pool. The state is essentially Chicago plus everything else: the Chicago metro contains roughly 9.4 million people, three-quarters of the state, and ranks among the largest concentrated dating markets in the country. Downstate, only the metro areas around Springfield, Peoria, Rockford, and the university twin cities of Champaign-Urbana offer pools of meaningful size.
The median age of 39.0 tracks close to the national figure, and Illinois women are relatively well educated, with about 38% of those 25 and older holding a bachelor's degree — a number pulled up sharply by Chicago's North Side and suburbs like Naperville and Evanston. Roughly 38% of adult women have never married. Years of net out-migration have shrunk the overall population, but the young-professional core of Chicago has remained comparatively resilient.
A national probability from our calculator scales roughly with a state's share of the US population: preferences matching 1% of US women translate to about 21,330 women in Illinois. State demographics like education and marriage rates shift the real figure up or down.
Calculate your match probability
Combine age, education, body type, and more filters against national data, then scale to Illinois's 2,133,000 women aged 18-44.
Methodology note
Estimates combine 2023 Census Bureau state population figures with American Community Survey age, sex, education, and marital status distributions. Figures are rounded estimates for statistical education, not precise counts. See our methodology and data sources.