The municipality Larissa was formed at the 2011 local government reform by the merger of the following 3 former municipalities, that became municipal units:
Umasipala waseKissamos wakhiwa kunguquko yohulumeni basekhaya ngo-2011 ngokuhlanganiswa komasipala abathathu bangaphambilini, ababa ngamayunithi kamasipala: