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.

Archives/Interpretation & Maintenance

The Delta Mill Society is looking to fill 3 summer positions, that of archives clerk, interpretation/programming, and maintenance. The deadline for application is 4 pm on Friday, June 11, 2021. These jobs are open to any Canadian citizen between the ages of 15 to 30 (Canada Summer Jobs grant requirement).

For full details, see the Summer Employment Opportunities (PDF)

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.


2021 NEWS

April 28, 2021. After much thought and consideration the Delta Mill Society has made the difficult decision not to open the Old Stone Mill, the Old Town Hall and the Mill Drive Shed to the public this season. With the unexpected 3rd wave and the current lockdowns restrictions we decided that keeping our doors closed to the general public was the safest thing to do for our volunteers, summer staff and the general public. We optimistically hope to perhaps be open for Delta Harvest Festival (last Saturday in September).

We will continue to work behind the scenes as we did last year. We plan to hire 3 summer staff to help our volunteers do needed archival, interpretive and maintenance work. We’ve also embarked on a large project to convert the forge in the Mill Drive Shed into a public friendly Blacksmith’s Shop. This is a project that we’ve wanted to do for years (decades) but only recently obtained funding to make a start on that big job.


  • 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 2021 

  • Admission: FREE (Voluntary donation)

  • 2021 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.

2021 Update - we are not grinding due to the closure of the mill due to COVID. We hope to be back at it in 2022.

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.

Unfortunately we're closed for 2021 due to COVID-19 but hope to be open again 2022.

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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See the best places to go in Delta with a plan including Old Stone Mill National Historic Site

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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© The Delta Mill Society

Website design & maintenance donated by: Ken Watson

Graphics design by Dan Moran and Ken Watson