Illinois is about 1,746 times bigger than The Hague (Den Haag).

The Hague (Den Haag) (excluding the city's 15.68 sq km of water area) is approximately 82 sq km, while Illinois is approximately 143,961 sq km, making Illinois 174,504% larger than The Hague (Den Haag).
Tip: This to-scale comparison of The Hague (Den Haag) vs. Illinois uses the Mercator projection, which distorts the size of regions near the poles.