Here's a handy reference list! Note that some states offer apps you can download too.
Download the State of Illinois DNR 2020 regulations: FishingDigest
Download the State of Michigan DNR 2020 regulations: MIFishingGuide2020_684742_7
Download the State of Minnesota DNR 2020 regulations: fishing_regs
Download the New York State Dept. of Environmental Conservation 2020 regulations: fishguide
Download the Ohio DNR Division of Wildlife 2020 regulations: 2020-21 Fishing Regs WEB
Download the Pennsylvania Fish and Boat Commission 2020 regulations (Pocket Guide version): bookfish-pocketguide
Download the Wisconsin DNR Hook and Line 2020 Fishing Regulations: fh0301