The Ancient Order of Hibernians (AOH) is founded in the United States on May 4, 1836, at St. James’ Roman Catholic Church in New York City, near the old Five Points neighbourhood. A branch is formed the same year at Pottsville, Pennsylvania. The existence and activities of the Order are concealed for some years.
During the late 1860s and early 1870s many of the lodges of the order in Pennsylvania are infiltrated by the Molly Maguires. However the Molly Maguires and their criminal activities are condemned at the 1876 national convention of the AOH and the Order is reorganised in the Pennsylvania coal areas.
In 1884 there is a split in the organisation. The Order has previously been governed by the Board of Erin, which has governed the order in Ireland, Great Britain and the United States, but is composed of officers selected exclusively by the organisations in Ireland and Great Britain. The majority leave in 1884 and become the Ancient Order of Hibernians of America, while the small group calls itself Ancient Order of Hibernians, Board of Erin. In 1897 the Ancient Order of Hibernians, Board of Erin, has approximately 40,000 members concentrated in New York, New Jersey, Ohio, Illinois, and Michigan, while the Ancient Order of Hibernians of America has nearly 125,000 members scattered throughout nearly every state in the union. The two groups reunite in 1898.
A female auxiliary, the Daughters of Erin, is formed in 1894, and has 20,000 members in 1897. It is attached to the larger, “American” version of the order. The AOH has 181,000 members in 1965 and 171,000 in 736 local units of “Divisions” in 1979. John F. Kennedy joins the AOH in 1947.
The Ladies Ancient Order of Hibernians (LAOH) raises $50,000 to build the Nuns of the Battlefield sculpture in Washington, D.C., which the United States Congress authorises in 1918. The Irish American sculptor, Jerome Connor, ends up suing the Order for non-payment.
In 1982, in a revival of Hibernianism, the Thomas Francis Meagher Division No. 1 forms in Helena, Montana, dedicated to the principles of the Order and to restoring a historically accurate record of Brigadier General Meagher’s contributions to Montana. Soon after, six additional divisions form in Montana.
The Order organises the New York City St. Patrick’s Day Parade for 150 years, emphasising a conservative Catholic interpretation of the Irish holiday. In 1993 control is transferred to an independent committee amid controversy over the exclusion of Irish-American gay and lesbian groups.
In 2013, The Ancient Order of Hibernians raises and distributes over $200,000 to aid victims of Hurricane Sandy.
In 2014, the AOH calls for a boycott of Spencer’s Gifts, for selling products the AOH says promote anti-Irish stereotypes and irresponsible drinking.
On May 10, 2014 a memorial to Commodore John Barry, an immigrant from Wexford who is a naval hero of the American Revolution and who holds commission number one in the subsequent United States Navy, is dedicated on the grounds of the United States Naval Academy. The memorial and associated “Barry Gate” is presented to the Academy by the members of the Ancient Order of Hibernians.
Several buildings of the Ancient Order of Hibernians are listed on the U.S. National Register of Historic Places or are otherwise notable.