North American Regional Grain Mills Directory
Find Real Flour, From Real Mills, Near You
JUMP TO GUIDEMost flour has no story. It left a factory somewhere in the industrial grain belt, sat in a warehouse, and arrived on a grocery shelf months later — stripped, often bleached and/or bromated, and completely anonymous.
The mills in this directory are the opposite of that.
These are the farms, stone mills, heritage grain producers, and milling bakeries that are quietly rebuilding a regional grain economy across the United States — growing identity-preserved wheat, milling it fresh on natural stone, and putting their name on every bag. Some have been doing it for centuries. Many launched in the last decade, part of a genuine resurgence in craft milling that's one of the most exciting developments in artisan baking today.
Whether you're a home baker hunting for freshly milled whole wheat, a cottage baker trying to source locally, or a serious sourdough enthusiast who wants to understand where your flour actually comes from — this is a great place to start.
Why Regional Flour Matters for Sourdough
Freshly stone-milled flour isn't just a romantic idea. It's structurally different from the commodity flour lining supermarket shelves. Stone milling runs cool and slow, preserving the wheat germ and its oils intact — oils that are rich in nutrients your starter culture feeds on. The bran remains in contact with the endosperm. The flour retains its natural enzymatic activity. The result ferments differently, tastes different, and behaves differently in the dough.
Industrial roller milling, by contrast, separates out most of the nutritional bran, removes the germ for shelf stability, and produces a flour that is consistent, shelf-stable, and almost entirely inert.
Regional mills also tend to work with specific wheat varieties selected for flavor, terroir, and milling character rather than yield and commodity performance. Many grow or source heritage and heirloom grains — Red Fife, Sonora, Einkorn, Emmer — that were displaced by industrial agriculture but are being quietly revived by the farmers and millers in this directory.
About This Directory
This directory was compiled by the team at Sourdough Geeks from five respected sources: Andrew Janjigian's Wordloaf regional millers list, the grain sourcing resource compiled by James Beard Award-winning baker Sarah Owens at Ritual Fine Foods, grain advocate Amy Halloran's mills list, the community-sourced Grinder Finder directory, and the New American Stone Mills community portfolio.
It covers more than 250 mills, farms, and milling bakeries across all five US regions, organized by state and tagged by type, along with Canada by province:
- Heritage / heirloom grain focus — mills working with identity-preserved, landrace, or ancient grain varieties
- Mills in-house — bakeries that stone-mill their own flour on premises and make it available to the public
- Indigenous grain traditions — producers working to preserve and revitalize pre-colonial and indigenous foodways
This is a living document. The regional grain movement is growing fast — new mills are opening, some are closing, and others are changing hands. We update this directory periodically and welcome community additions. If you know of a mill that belongs here, let us know with this form.
How to Use It
Use the region buttons to filter by area, or click any state tile to see every mill listed for that state. The search bar finds mills by name, state, or tag — so searching "heritage" will surface every mill with a heritage grain focus, and searching "Tennessee" will show you every Tennessee entry.
Each card links directly to the mill's website where you can explore their current grain offerings, order online, or find out if they supply to local retailers or co-ops near you.
A few tips from experience:
Check farmers' markets first. Many smaller mills don't sell online at all — they sell at regional markets and to local restaurants. A Google search for the mill name plus your city often turns up stockist information that isn't on their website.
Ask your favorite baker. If there's a bakery in your area making exceptional sourdough, they almost certainly have a flour source worth knowing about. Most bakers are happy to talk about where their grain comes from.
Buy fresh and use it. Stone-milled whole grain flour is at its best in the first few weeks after milling. It's not a pantry staple — treat it more like a fresh ingredient. Many mills include a milling date on the bag.
Start with a blend. If you're new to freshly milled flour, start by substituting up to 20% of your usual bread flour with something from this list. The flavor difference will be immediately obvious, and you can dial up the percentage as you get comfortable with how it handles.
US & Canada Regional Grain Mills Directory
Compiled from Wordloaf, Ritual Fine Foods, Amy Halloran, Grinder Finder, and New American Stone Mills. Select a region to filter, then click a state or province tile to see its mills.
The Bigger Picture
The United States had over 23,000 grain mills in the 1800s. By 2019, fewer than 200 remained. The twenty largest milling operations now produce close to 95% of all flour in the country.
The mills in this directory are pushing back against that consolidation — not with nostalgia, but with genuine craft. They're building relationships between farmers and bakers, reviving grain varieties that nearly disappeared, supporting soil health and regional food economies, and producing flour that tastes like something.
When you buy from a regional mill, you're doing more than sourcing a better ingredient. You're participating in a food system that's worth supporting.
That's what Sourdough Geeks has always been about — taking the craft seriously, understanding the why behind the how, and baking with intention. This directory is an extension of that.
Start baking with better flour. Your starter, your bread, and everyone who eats it, will thank you!
