Austria is about 1.7 times smaller than Illinois.

Illinois is approximately 143,961 sq km, while Austria is approximately 83,871 sq km, making Austria 58.26% the size of Illinois. Meanwhile, the population of Illinois is ~12.7 million people (3.5 million fewer people live in Austria).
Tip: This to-scale comparison of Illinois vs. Austria uses the Mercator projection, which distorts the size of regions near the poles.
Our free app, MapSize by MyLifeElsewhere — compare any two places, to scale on your mobile device.