Irish Bayou is a community along a body of water of the same name within the legal boundaries of the city of New Orleans, Louisiana, but separated from the rest of the city by undeveloped wetlands. It falls within a group of communities collectively known as Eastern New Orleans. It is located at latitude 30°08'30", longitude 89°51'50", with an average elevation of 1 meter. It is primarily a sport fishing community with few permanent residents.
The Irish Bayou Castle depicted at right was built in 1981 as a tourist attraction, although the castle has remained primarily in private hands as a hunting and fishing camp.
The origin of the community of Irish Bayou is obscure.
The area is briefly mentioned in the James Bond film "Live and Let Die", during a boat chase.