The parish of Beitstad was established as a municipality on 1 January 1838 (see formannskapsdistrikt). The neighboring municipality of Namdalseid to the north was merged with Beitstad in 1846. Then on 1 January 1904, the northern district of Namdalseid (population: 1,368) was separated from Beitstad to create a municipality of its own (once again). The split left Beitstad with 2,946 inhabitants. On 1 July 1913 another split took place. The western district of Malm (population: 993) was established as a separate municipality, leaving Beitstad with a population of 1,934. On 1 January 1964, a major municipal merger took place. The municipalities of Beitstad Egge, Kvam, Ogndal, Sparbu, Steinkjer, and Stod all merged to form a new, larger municipality of Steinkjer. Prior to the merger, Beitstad had a population of 2,563.