The mills listed here are the buyers at the end of the line for Wisconsin wood. A landowner rarely sells straight to one: a mill buys wood delivered to its gate, and getting trees there takes a logging crew, so the offer in front of you normally comes from a logger, a timber dealer, or a consulting forester selling on your behalf. Which mills sit within reach of your county is what decides who those bidders are and what they can afford to pay.
Haul distance is why a state mill list is worth anything to a seller. Trucking comes out of the same load the timber does, so a tract twenty minutes from a mill is worth more than the identical tract two hours away - same trees, different cheque. This page carries 211 facilities across 63 counties, 173 of them on the map above, so you can see what sits within working distance of your ground before anyone quotes you a number.
173 of the 211 Wisconsin listings are sawmills, alongside 8 other processors, 6 pellet & energy plants, 5 chip mills, and a few other plant types. Tops and small stems are sold as pulpwood, and the 6 pellet & energy plants, 5 chip mills, and 4 pulp & paper mills on this page are where that wood is taken. The Wisconsin records name what each plant accepts - oak, maple, pine, ash, and aspen among 24 species in all - so the species line on a card tells you whether your stand is what that mill runs. A stand is usually worth sorting into products - pulpwood, chip-n-saw, sawtimber, and veneer where the logs justify it - rather than selling the lot as one thing, and the mill type and species lines on every card below are where working that out starts.
Whoever ends up cutting it, run a process instead of taking the first offer. Hire a consulting forester who works for you, have the timber cruised and marked so every buyer is bidding on the same defined lot, then take sealed bids opened on a stated date. One unsolicited offer is a price, not the price. The landowner's guide walks the whole sale in the order it happens, and sealed bidding is how you put one tract in front of several buyers at once.
23 species are named across these Wisconsin listings, oak by 95 of them. There is a guide here for white oak, red oak and Southern yellow pine, each one covering grade, form, the defects that cost money and what the wood is normally cut for - which is how you work out whether your stand is what these mills run. Shorter entries on the same page cover hard maple and soft maple - what buyers take each for, and the catch.
Wisconsin Department of Natural Resources publishes state timber sale offerings and results. Updated once a year. That is public record rather than a licensed average, so the page on timber prices in Wisconsin can carry the figures themselves, each one with the sale and the edition behind it. A state average is still not your cheque - species, county, and which mills are buying this quarter decide that, which is the argument the market board makes at length.
A mill does not care which side of a state line your county is on, and neither should the search. Michigan's 302 listings sit across Wisconsin's own borders, and the state-by-state index carries every state covered so far. If your ground is within a couple of hours of a line, read both.