Halmstad Municipality is a municipality in Halland County on the Swedish west coast, in which the city Halmstad is the seat.

Halmstad is a port, university, industrial and recreational city at the mouth of the Nissan river, in the province of Halland on the Swedish west coast. Halmstad is the seat of Halmstad Municipality and the capital of Halland County. The city had a population of 71,422 in 2020, out of a municipal total of over 100,000. Halmstad is Sweden's 19th-largest city by population and located about midway between Gothenburg and Malmö.