Societies & Groups » Societies & Groups - O

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• Ontario County Historical Society

  Canandaigua, New York.

• Ontario Genealogical Society

  Canada.

  • OGS Branches

    • Brant County Branch, Ontario Genealogical Society

    • Bruce and Grey Branch of the Ontario Genealogical Society

    • Durham Region Branch of the Ontario Genealogical Society

      Previously named the Whitby-Oshawa Branch.

    • Elgin County Branch, Ontario Genealogical Society

    • Essex County Branch

    • Haldimand County Branch - Ontario Genealogical Society

    • Halton-Peel Branch, Ontario Genealogical Society

    • Hamilton Branch, Ontario Genealogical Society

    • Huron County Branch OGS

    • Kawartha Branch, Ontario Genealogical Society

      Peterborough.

    • Kent County Branch of the Ontario Genealogical Society

    • Kingston Branch, Ontario Genealogical Society

    • Lambton County Branch of the OGS

    • Leeds & Grenville Genealogical Society

    • London & Middlesex County Branch of the Ontario Genealogical Society

    • Niagara Peninsula Branch Genealogy - Ontario Genealogical Society

    • Nipissing District Branch, Ontario Genealogical Society

      Nipissing, Temiskaming and Parry Sound.

    • Ottawa Branch, Ontario Genealogical Society

    • Oxford County Branch

    • Perth County Branch, Ontario Genealogical Society

    • Quinte Branch Ontario Genealogical Society

      The Quinte Branch of the Ontario Genealogical Society (OGS) covers the Bay of Quinte area (Hastings and Prince Edward Counties) and encourages, assists, and brings together all those interested in the pursuit of family history.

    • Sault Ste. Marie & District of Algoma, Branch of Ontario Genealogical Society

    • Simcoe County Branch, Ontario Genealogical Society

    • Sudbury Branch, Ontario Genealogical Society

    • The Norfolk County Branch of the Ontario Genealogical Society

    • Thunder Bay Branch, Ontario Genealogical Society

    • Toronto Branch of the Ontario Genealogical Society

    • Waterloo Branch, Ontario Genealogical Society

    • Wellington County Branch Ontario Genealogical Society

    • York Region Branch, Ontario Genealogical Society

• Ontario Monument Builders Association

• Ontonagon County Genealogical Society

  Ontonagon, Michigan.

• Ontonagon County Historical Society

  Michigan.

• Oorlogsgravenstichting - OGS

  The Netherlands War Graves Foundation.

• Oracle Historical Society

  Arizona.

• Oral History Association

• Oral History Association of Dickinson College

• Oral History Society

• Oran M. Roberts Chapter 440, UDC

  United Daughters of the Confederacy chapter, located in Houston, Texas.

• Orange County California Genealogical Society (OCCGS)

• Orange County Genealogical Society

  Paoli, Indiana.

• Orange County Genealogy Society

  Goshen, New York.

• Orange County Historical Society

• Orange County Historical Society

  Paoli, Indiana.

• Orange County Historical Society

  Orange, Texas.

• Orange County Historical Society, Inc.

  Virginia.

• Orange County Mayflower Colony

  California.

• Orangeburgh German-Swiss Genealogical Society

  South Carolina.