Division 5 was organized by the Suffolk County Board on March 13, 1956. The name of the Division is Saint Patrick*, and the location of the Division is Patchogue, New York*. The first set of Officers were: President - Francis J. Costello, Vice-President - John Scully, Recording Secretary - Jay C. Rowland, Jr., Financial Secretary - Edward B. Kiernan, Treasurer - William Ackerman.

There were fifteen Charter Members initiated into Division number 5 on this date. A special meeting was held by the Suffolk County Board of the Ancient Order of Hibernians in the VFW Hall, on Edwards Street in Patchogue, NY, for the purpose of organizing this new Division and installing the first set of Officers. The Degree Team for this occasion consisted of of County President John Heslin, Thomas Fahey, Ernest Francis, and William Johnson. Brothers McCarthy and Rupton acted as Marshals, Brother Joseph Murphy was the County Organizer at that time.

The Suffolk County Board sponsored two Saint Patrick's Day Parades. The first was held on March 17, 1962, and the second on March 16, 1963. These parades were held in Patchogue, and Division 5 was the Host Division. Brother Joseph A. Conley of Division 5 was the Chairman for both parades. Both parades were very well attended and were listed as the largest parades ever held in Patchogue. They were a great step forward for the AOH in Suffolk County, and brought great honors and recognition to our society. Division 5 was greatful for the opportunity to be host and have the parades held in our area. It was unfortunate that the second and last parade to be sponsored by the Suffolk County Board went overboard in expenses, and resulted in a loss which had to be made up by assessing each Division. A third parade was planned for the following year, also in Patchogue, but the Mayor of Patchogue, Robert Waldbauer, changed his mind. After meetings held with him, in which he offered to personally sign the letters to be sent out to the merchants for contributions to support the parade, he refused the Permit needed to hold the parade in Patchogue. The parade committee then had to cancel the parade and notify all participants of said cancellations.

*Today, our Division is Proudly named the Mary and Joseph Thompson Division, after long time members who were instrumental in the formation of the Division. We currently meet in Mastic, with several of our current Brothers having deep family history with Division 5. Our reach is wide across south central Suffolk County. Although we are not the largest, our voice is heard in defense of the issues we hold close, be it the Suffolk County Board, or in the Halls of the State, or the National AOH. From humble beginnings our small but proud Division is growing again, and with the grace of the Lord above will continue to spread our message of Friendsip, Unity, and Christian Charity.