National parks in Illinois

The parks listed below cover everything the National Park Service maintains within Illinois. They include flagship parks (the names most travelers come for), plus the smaller monuments, historic sites, battlefields, and recreation areas that round out a serious itinerary. If you're putting together a state-focused trip, working from this list — rather than a generic top-five — will surface places you'd otherwise miss.

Each link below opens a full visitor guide: hikes, camping, nearby attractions, and visitor tips for that specific destination. Read them in any order — they're written to be standalone.