Irish Riviera is a slang expression that can refer to any of several seaside communities in the United States with high population densities of Irish-Americans, including: * Indiana * Michigan City, a city in northwest Indiana on the shores of Lake Michigan * Massachusetts * Marshfield, a town south of Boston in Plymouth County on the Atlantic coast * Scituate, a town south of Boston in Plymouth County on the Atlantic coast * South Boston, a neighborhood of Boston * The South Shore, a region south of Boston Harbor along the Atlantic coast * Squantum, a neighborhood of Quincy * Michigan * New Buffalo, A city on Lake Michigan's Gold Coast * New Jersey * Avon, a borough in central New Jersey on the Atlantic coast * Belmar, a borough in central New Jersey on the Atlantic coast