The Shamrock Inn was first licensed by Daniel O'Brien in 1858. It operated for 40 years originally in a building on the other side of Reedy Creek until it was dismanted in 1872 and rebuilt in this location.
The Shamrock Inn was visited by many bushrangers including Ben Hall, Frank Gardiner, John Gilbert, Fred Lowry and John Dunn. 2 of those visits were robberies.
Daniel O'Brien purchased a large amount of land in this area. He donated the land for the Laggan Catholic Church which is now used as the Laggan Cemetery. He bred thoroughbred race horses and constructed a race track across from the inn.
The Shamrock Inn closed becoming a private residence and farm in 1897 when the then owner, Jane Cummins, bought the Laggan Hotel.
Thanks to Monica Croke's Hotels, Inns and Shanties of the Upper Lachlan Shire and trove.nla.gov.au which were used to research the information in this description.