Halmstad Municipality (Halmstads kommun) is a municipality in Halland County on the Swedish west coast, in which the city Halmstad is the seat.The 1971 local government reform was implemented gradually in the area. In 1967 the rural municipality Simlångsdalen (created in 1952) was amalgamated into the City of Halmstad. The city was converted into a municipality of unitary type in 1971, but the seven surrounding municipalities were not merged into it until 1974.