🐟 What fish can you catch in Illiopolis?

Most commonly caught species around Illiopolis , IL : Largemouth bass - 2,705 reported catches Channel catfish - 882 reported catches Bluegill - 407 reported catches Black crappie - 314 reported catches Blue catfish - 240 reported catches .

📢 What are the latest Illiopolis fishing reports?

The latest Illiopolis , IL fishing reports are: @mmurphy7086 reported a nice Blue catfish at Clinton Lake . @Montero420 reported a nice Largemouth bass at Lake Decatur . @griffinroberts7448 reported a nice Redear sunfish at Jacksonville Branch . @noahhines8931 reported a nice Black crappie at Lake Decatur . @kylel5788 reported a nice Largemouth bass at Weldon Springs Lake . .

Fishing in Illiopolis, IL

Q: 🎣 Where to fish in Illiopolis, Illinois?

Anglers in Illiopolis , IL recommend these top fishing spots: Sangamon River , Wiggers Pond (Mount Pulaski Pond) , South Fork Sangamon River , Lake Fork .

Q: 📅 What is the best time to go fishing in Illiopolis?

Download the Fishbrain app and see today's Fishing and Weather Forecast for Illiopolis , IL . We give you weather trends and help you find the perfect window to catch your next personal best. With Fishbrain Pro , you will get the following capabilities: Plan smarter: Get hour-by-hour fishing weather conditions. Fish at peak times: Use BiteTime™ predictions to maximize catches. Stay ahead of the weather: Get hyper-local, real-time updates. .

Q: What's the biggest Bluegill caught in Illiopolis?

The biggest Bluegill (by length) reported in Illiopolis , IL was a 5 ft / 5 lbs caught by Fishbrain user @knagy4752 at Lake Decatur on July 1, 2016 .

Illinois, United States

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Top fish species in Illiopolis

Latest Illiopolis fishing reports

Blue catfish

Clinton Lake

length · weight

Largemouth bass

Lake Decatur

length · weight

Redear sunfish

Jacksonville Branch

length · weight

Black crappie

Lake Decatur

length · weight

Largemouth bass

Weldon Springs Lake

length · weight

Channel catfish

Clinton Lake

length · weight

Dreamland Pond

length · weight

White crappie

Lake Decatur

length · weight

Largemouth bass

Lake Decatur

length · weight

Largemouth bass

Lake Decatur

length · weight

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Fishing regulations in Illiopolis

Disclaimer: Always check local fishing regulations, water access rights and land ownership before fishing, regardless of any catches logged in that area by the Fishbrain community. Fishbrain has mapped millions of acres of government-owned land across the USA to help you identify potential fishing access, but you are responsible for ensuring compliance with all legal requirements.

Fishing regulations in Illinois can change throughout the year. Make sure to check this page before fishing for the most up to date rules and regulations for the current season. Local regulations govern when you can fish, the max size of the fish you can keep, how many fish you can keep, and more.

Below you will see fishing regulations for catching Largemouth bass as of May 8th, 2026. To view regulations for a different fish species, please click on your preferred species in the drop-down.

Select species

Largemouth bass

Seasons

Open

Bag limit

Aggregate

There is no statewide size limit. Daily harvest limit is 6 Bass, either singly or in the aggregate, except as specified under Site-Specific Regulations. Only statewide regulations are shown herein, but you can access Site-Specific Regulations online.

Very good Catch, Clean, Cook Largemouth Bass by BlueGabe

Micropterus nigricans

Regulations for

39°50′59.3″N 89°15′7.6″W

Regulations in the map

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FAQ about Illiopolis fishing

Anglers in Illiopolis, IL recommend these top fishing spots: Sangamon River, Wiggers Pond (Mount Pulaski Pond), South Fork Sangamon River, and Lake Fork.

Most commonly caught species around Illiopolis, IL:

Largemouth bass - 2,705 reported catches
Channel catfish - 882 reported catches
Bluegill - 407 reported catches
Black crappie - 314 reported catches
Blue catfish - 240 reported catches

The latest Illiopolis, IL fishing reports are:

@mmurphy7086 reported a nice Blue catfish at Clinton Lake.
@Montero420 reported a nice Largemouth bass at Lake Decatur.
@griffinroberts7448 reported a nice Redear sunfish at Jacksonville Branch.
@noahhines8931 reported a nice Black crappie at Lake Decatur.
@kylel5788 reported a nice Largemouth bass at Weldon Springs Lake.

Download the and see today's Fishing and Weather Forecast for Illiopolis, IL. We give you weather trends and help you find the perfect window to catch your next personal best. With Fishbrain Pro, you will get the following capabilities:

Plan smarter: Get hour-by-hour fishing weather conditions.
Fish at peak times: Use BiteTime™ predictions to maximize catches.
Stay ahead of the weather: Get hyper-local, real-time updates.

The biggest Largemouth bass (by length) reported in Illiopolis, IL was a 12 ft / 3 lbs caught by Fishbrain user @jonnyfootball at Sangchris Lake on May 1, 2015.

The biggest Channel catfish (by length) reported in Illiopolis, IL was a 50 lbs caught by Fishbrain user @alarsen489 at Lake Springfield on August 16, 2016.

The biggest Bluegill (by length) reported in Illiopolis, IL was a 5 ft / 5 lbs caught by Fishbrain user @knagy4752 at Lake Decatur on July 1, 2016.