PO Box 523, Station B, Ottawa, ON, K1P 5P6
Slide 1 - With Welcome Message - Bottom

Lady and Lord Aberdeen with the National Council of Women at Rideau Hall, shortly before their return to the United Kingdom, October 1898, Topley Studios/Library and Archives Canada, PA-029033

Truss Bridge over the Chaudière Falls, Ottawa River, watercolour by John Burrows, 1828, Library and Archives Canada, I.D. No. 2833217.

Timber raft on the Ottawa River, date unknown, John William Woolsey and family fonds, Library and Archives Canada, I.D. No. 319157.


The Historical Society of Ottawa (HSO) is Ottawa’s oldest historical organization.The principal aim of the Society is to increase public knowledge of the history of Ottawa and the surrounding region through meetings, tours, awards, publications, and sponsored research.

HSO Articles

  • Jimmy Carter: Chalk River and Beyond

    4 December 2022 Speakers Presentations
    Over the years, the Historical Society of Ottawa has had many presentations about people who have had a significant impact on the history of Ottawa and the Ottawa Valley, and we’ve always been able to count on guest speakers who have researched their subject well, but its quite rare to…
  • HSO Presents: Our Land, Our People — The Algonquins

    24 November 2022 HSO News
    REGISTER at http://tinyurl.com/HSO-30-Nov-2022 for our free online presentation scheduled for Wednesday, November 30th at 7pm. The Ottawa Valley has been home to the proud Algonquin people for as many as 8,000 years. Long before the arrival of Europeans, the Algonquins lived, hunted trapped, fished, socialized and traded on both sides…
  • "Through My Lens" With Guest Speaker Rod MacIvor

    20 November 2022 Speakers Presentations
    Rod MacIvor enthralled us on November 16, 2022, with tales from his four decades as an award-winning Ottawa-based photojournalist, while sharing images of some the most remarkable photographs he has captured over the years. His seemingly endless portfolio of iconic photos included those taken of Pierre Trudeau and family (including…
  • Philemon Wright & His Town

    27 October 2022 Speakers Presentations
    We returned to our in-person Speaker Series on September 14, 2022, after a two and half year hiatus, with a fascinating presentation by Rick Henderson, great-great-great-great-grandson of Philemon Wright. Rick's presentation included not only thoroughly researched detail and a great selection of images, but also an excerpt from his recently…

Upcoming Events

Jan 11 2023
1:00PM - Ottawa Public Library, Main Branch Auditorium

Whitton or Dewar?

Elisabeth Arnold | Dave Mullington

Jan 25 2023
7:00PM - Online via Zoom

Thomas Mackay & The Making of Ottawa

Alastair Sweeny

Ottawa Stories

Ottawa has an interesting and varied history.
Enjoy stories from this month in history or discover other Ottawa stories.

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