Louise Moriarty (born 22 December 1978) is an Irish racing cyclist from Dublin.
She was the Irish National Time Trial Champion in 2006 and 2007.
In 2008, Moriarty broke the national pursuit record at Newport Velodrome, Wales, setting a new time of 3:55.853, beating the old record of 3:59.194 by over three seconds.
The new record took her within two seconds of qualifying for the world championships.
She also became the Irish 500m TT, points race, scratch race and pursuit champion.