What the Resident Inland Trout Stamp covers
The Resident Inland Trout Stamp is a separate permit you buy in addition to your Illinois fishing license if you want to fish for trout in inland waters — lakes, ponds, and streams that are not Lake Michigan. Without it, you cannot legally keep trout you catch, even if you hold a valid fishing license.
The stamp lets you fish for and keep trout in designated inland waters across Illinois. It does not cover Lake Michigan trout fishing, which requires a different permit. The stamp is valid for one calendar year from the date you purchase it.
You need both a current fishing license and the trout stamp to be legal. The license covers your right to fish; the stamp is the specific permission to target and keep trout in inland waters.
Key Takeaways
- You must buy the Resident Inland Trout Stamp in addition to your regular Illinois fishing license to keep trout from inland waters.
- The stamp costs a set amount and is valid for one calendar year from purchase, not from January 1.
- You can buy the stamp online through the Illinois Department of Natural Resources website, by phone, or at authorized vendors including bait shops and sporting goods stores.
- The stamp does not cover Lake Michigan; trout fishing there requires a separate Lake Michigan stamp.
- Illinois has specific daily catch limits and size restrictions for trout that vary by water body, so check the current regulations before you fish.
Where to buy the stamp and current cost
You can purchase the Resident Inland Trout Stamp through the Illinois Department of Natural Resources (IDNR) online licensing system at the agency's website. You can also buy it by phone through their licensing office or in person at authorized vendors throughout the state, including bait and tackle shops, sporting goods retailers, and some outdoor outfitters.
The cost varies and can change year to year. Check the IDNR website or call their licensing office for the current price. Many vendors charge a small transaction fee on top of the stamp cost if you buy in person or by phone.
When you buy online, you receive the stamp immediately and can print it or display it on your phone. In-person purchases are instant as well. Keep proof of purchase with you while fishing — the vendor receipt or your printed stamp serves as your proof.
Which waters you can fish with the stamp
The Resident Inland Trout Stamp covers trout fishing in designated inland waters throughout Illinois. These include stocked trout streams, spring-fed creeks, and certain lakes and ponds managed for trout. Not every body of water in Illinois has trout, and not all trout waters are open year-round.
The IDNR publishes a list of approved trout waters and their specific seasons on their website. Some waters are open only during certain months; others close to protect spawning populations. Before you plan a trip, check the current water-by-water regulations because they change and some waters may be temporarily closed for management reasons.
Lake Michigan trout fishing is not covered by the inland stamp. If you want to fish for trout in Lake Michigan, you need a separate Lake Michigan stamp in addition to your fishing license.
Catch limits and size restrictions
Illinois sets daily catch limits and minimum size requirements for trout, and these can differ depending on which water you are fishing. Some waters have a five-fish daily limit; others allow fewer. Minimum size is often 7 or 8 inches, but some waters have higher minimums or slot limits (a range of sizes you must release).
The IDNR fishing guide and the online regulations page list the rules for each trout water. Read the specific water's entry before you fish, because violating catch or size limits can result in a citation. Rules change periodically, so do not rely on what you remember from last year.
You are responsible for knowing the rules for the water where you fish. Ignorance is not a defense if you are checked by a conservation officer.
How the stamp works with your fishing license
Your Illinois fishing license and your Resident Inland Trout Stamp are two separate documents that work together. The license gives you the general right to fish in the state; the trout stamp gives you the specific right to target and keep trout in inland waters.
Both must be current and valid. If your fishing license expires, your trout stamp does not automatically become invalid, but you cannot legally fish at all without a valid license. If your trout stamp expires, you can still fish with your license, but you cannot keep trout — you must release any trout you catch.
When you buy the stamp, note the expiration date. Many anglers buy their stamp at the same time they renew their license to keep track of both dates in one place.
Seasons and timing for trout fishing
Trout season in Illinois varies by water. Some inland trout streams and lakes are open year-round; others have specific opening and closing dates. Spring-fed creeks often open earlier in the year than other waters because cold water temperatures support trout earlier.
The IDNR website lists opening and closing dates for each designated trout water. Plan your trip around these dates, because fishing for trout outside the open season is illegal even if you hold a valid stamp and license. Some waters close in summer when water temperatures rise above what trout can tolerate.
Check the regulations before you go. A trip to a closed water wastes time and money, and fishing a closed water can result in a citation.
Frequently Asked Questions
Do I need a trout stamp if I am only fishing for other species in the same water?
No. If you are fishing for bass, catfish, or other species and you do not intend to keep trout, you do not need the stamp. However, if you catch a trout and want to keep it, you must have the stamp. Many anglers carry one just in case, since trout are common in many Illinois waters.
Can I fish for trout in Lake Michigan with the inland trout stamp?
No. Lake Michigan requires a separate Lake Michigan stamp. The Resident Inland Trout Stamp covers only inland waters — lakes, ponds, and streams away from Lake Michigan. If you plan to fish both, you need both stamps.
What happens if I fish without the stamp and get caught with trout?
You can receive a citation and fine. The penalty varies but can be substantial. A conservation officer can check your license and stamp at any time while you are fishing. Carry both documents with you and keep them current.
Does the stamp expire on December 31 or on the anniversary of when I bought it?
The stamp expires one calendar year from the date you purchase it, not on December 31. If you buy it in March, it expires in March the following year. Check your receipt or printed stamp for the exact expiration date.
Can I buy a trout stamp if I do not have a fishing license yet?
You need a valid fishing license to fish legally in Illinois. You can buy the license and stamp together or separately, but both must be current. If you do not have a license, purchase one first through the IDNR website or an authorized vendor.