Lake Killarney

Lake Killarney may refer to:


 * Lake Killarney (Illinois)
 * Lake Killarney (Louisiana), located within Louisiana State Penitentiary
 * Lake Killarney (Missouri)
 * Lake Killarney (Washington)
 * Lake Killarney (Bahamas), New Providence Island
 * Lakes of Killarney, Ireland
 * Lake Killarney (New Zealand), lake in Tākaka