Old Stone Mill NHS - The Delta Mill Society

Old Stone Mill - photo by Ken W. Watson
The Old Stone Mill in Delta Ontario is a National Historic Site showcasing milling technology and 1800s industrial heritage. The mill was built in 1810 and is one of the finest examples of early industrial architecture in the region.

The mill features interpretive displays, an operating waterwheel, millstones, bolter, grain elevators, and artifacts illustrating the grist milling process through the years. You can tour the mill yourself or enjoy a free guided tour.

During the summer we grind heritage wheat into flour using our 200 year old millstones. Our stone ground flour is available in our small gift shop which also offers interesting mementos of your visit.

CLOSED for 2020

May 19, 2020 - the Board of Directors of the Delta Mill Society have made the difficult decision not to open for the 2020 season due to the risk of COVID-19.

We are self-funded and with the loss of revenue due to being closed we are more dependant than ever on donations. This year, in addition to all our regular fixed costs (insurance, utilities, etc.), we also have to replace the leaking roof of our turbine shed. So please consider a donation today

We are a self-funded, volunteer based organization. Memberships and donations are our life blood. Please consider joining us and/or making a donation today.



  • Location: In Delta, Ontario
  • (44 King Street / Cty Rd. 42)

    GPS: 44° 36.610′ N (44° 36′ 37" N)
             76° 07.340′ W (76° 07′ 20" W)

  • Open: CLOSED for 2020.

  • Admission: FREE (Voluntary donation)

  • 2020 Events: See Events Page

  • Information: Box 172, Delta, ON, K0E 1G0. Tel: 613-928-2584 Email: info@deltamill.org

Please pay us a visit soon - we know that you will enjoy it!

Location Map

Google Earth View the Old Stone Mill in Google Earth
(You must already have Google Earth)
(choose "Open" if asked)

We rely on the personal generosity of our volunteers to be able to maintain and showcase this remarkable example of Ontario history. We ALWAYS need more help. See our VOLUNTEER PAGE.

Rent the Old Town Hall

Our newly renovated Old Town Hall is available for rent. It is perfect for any sort of gathering: weddings, dances, family reunions, conferences, theatre, banquets, art & craft show, or whatever. A commercial kitchen allows for food preparation on site.

For more information see our Old Town Hall Rental Page.

History of the Old Stone Mill

The Old Stone Mill is the only surviving pre-1812 stone grist mill in Ontario. Built in 1810, it followed the design of an automatic gristmill created by American inventor Oliver Evans. It has some unique features, including having acted as its own dam. You can learn all about the history of the mill by visiting our History Page (and by visiting the mill to actually see and touch history)


The Old Stone Mill and the Old Town Hall are owned and operated by The Delta Mill Society, a self-funded, non-profit organization run by volunteers. Accordingly, we have lots of people to thank for helping us get to where we are today. See our Thanks Page for full details.

All About Our Stone Ground Flour

Visit the All About Our Stone Ground Flour section of this website for interesting information and videos of how the wheat we use is grown, how the grain is stone ground, how the ground flour is sorted, best uses for our flour and FREE BREAD RECIPES.

Visit Our Gift Shop

Our gift shop is located in the Old Stone Mill. Proceeds from sales go to maintenance and operation of the Old Stone Mill.  New for 2018 - we can now accept credit and debit cards.

For a sneak peek at what's available in gift shop - see our Gift Shop Page.

Welcome Cyclists

We welcome cyclists travelling through Delta. If you haven't been our way we have several cycling tour descriptions (starting from the Old Stone Mill) available. See our Tours Page for information.

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The Delta Mill Society   The Delta Mill Society
Box 172, Delta, Ontario K0E 1G0
Tel: 613-928-2584 (office)
Email: info@deltamill.org
The Delta Mill Society

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Website design & maintenance donated by: Ken Watson

Graphics design by Dan Moran and Ken Watson