Official Cassidy Clan Website: Céad Míle Fáilte

Finte na hÉireann – Clans of Ireland

Welcome to the Official Cassidy Clan Website.  The Cassidy Clan is a perpetual hereditary association comprised of persons that bear the Cassidy surname or are descended from an ancestor with the Cassidy surname or any of the variant spellings of Cassidy.  In the United States, many Cassidy variations exist, including Cassity, Cassaday and Casada.  

Membership in our Irish Clan is open to all persons without regard to race, ethnic origin, religion, age or gender.  We take great pride in our heritage, seek to build common bonds among all Cassidys and their descendants and host a rally in County Fermanagh, Northern Ireland where the Cassidys originated. Please attend our 2014 Rally.  

Please also visit and like the Cassidy Clan on Facebook and the Cassidy Clan Channel on YouTube.


The Cassidy Clan is a nonprofit organization founded and based in Ireland, and run entirely by volunteers from around the world.  All funds raised are dedicated to clan activities, free genealogy consultation, producing the clan newsletter, organizing Cassidy Clan Rallies, research, special projects, and hosting the web site. 

Our clan is one of the most vibrant clans in Ireland.  By joining, you will be supporting our goals and helping strengthen the Cassidy Clan.

All donations are greatly appreciated.  We also welcome your non-monetary support by providing family histories and articles on Cassidys for the web site and clan newsletter.

Copyright Notice
          All photographs posted within this website, with the exception of the aerial and long distance view of Devenish Island and other contributed by Janet Cassidy-Stroh and Brent Cassidy, are copyrighted 1999-2014 by Stephen Cassidy. Unless otherwise noted or attributed to a specific author, all text is copyrighted the Cassidy Clan. No photographs or text may be reprinted or republished in any form without the prior written permission of Stephen Cassidy or the Cassidy Clan.

Copyright © 1998-2014 Cassidy Clan

The Cassidy Clan is pleased to announce the release of the book "Speculated Truth: A Genealogical Journey of Truth and Speculation" by Clan Secretary Brent Cassidy. The book is for all persons interested in Cassidy genealogy, Irish culture, traveling to County Fermanagh and Ireland.  Please click here to read more about the book and learn how to order a copy.


Inch Strand in County Kerry on the Dingle Peninsula by Sarah Cassidy.
Click here to view a larger image