Balsfjord is a municipality in Troms county, Norway. The administrative centre of the municipality is the village of Storsteinnes, while Nordkjosbotn at the head of the fjord is another village.The municipality consists of two fjords, Malangen and Balsfjorden, surrounded by comparatively rich farmlands under majestic peaks including the southern end of the Lyngen Alps.
Balsfjord was originally a part of the great Tromsøe landdistrikt municipality, but it was separated from this in 1860 to form its own municipality. Balsfjord had an initial population of 3,610. On 1 January 1871, Malangen (population: 1,425) was separated from it, leaving Balsfjord with 2,255 inhabitants. On 1 January 1875, a part of Lyngen (population: 7) was transferred to Balsfjord. On 1 January 1905, a part of Balsfjord (population: 5) was transferred to Målselv.
On 1 January 1964, most of Balsfjord was merged together with most of neighboring Malangen to form a new, larger municipality of Balsfjord (population: 6,993). Also on that day, the Skogli ved Heia area (population: 2) was transferred to Målselv and the uninhabited Elvebakken farm was transferred to Storfjord. On 1 January 1966, the Sørelvmo area of Balsfjord (population: 131) was transferred to Målselv.