Here are a number of marriages in the USA involving the bride/groom from Co.Louth Ireland.
Baptised at Knockbridge, Co Louth. 08-03-1885 Thornton Joseph Newragh of Thornton Patrick and Morgan Brigid sponsors - Joseph Macardle and Margaret English married Theresa Stuart Black 03-09-1918 St Joseph', New York USA
Baptised at Louth Co. Louth 24-08-188? married James McAuliffe 01-06-1911 Harlford? Conn U S A
Baptised at Louth, Co. Louth 02-03-1886 Gilmore Mary married John McGoonan 08-11-1929 Ch Of Our Lady Of Perpetual Sucour New York
There is a good number in my records.