Pajala Municipality (Swedish: Pajala kommun; Finnish: Pajalan kunta) is a municipality in Norrbotten County in northern Sweden, bordering Finland. Its seat is located in the locality of Pajala.

In 1884 Tärendö was detached from Pajala Municipality, forming a municipality of its own. In 1914 Pajala Municipality was once again split when Junosuando broke away. They were reunited in 1971, when Korpilombolo was added as well.

Its geographical location means that Pajala Municipality has always been a natural trading place, where people from Sweden, Finland and the native Sami people gathered. The annual Pajala market traces its history from the 18th century.

The home of Lars Levi Læstadius, famed botanist and Christian revivalist movement founder is located in Pajala. It is the red house to the right; it is now a museum. The yellow house in the middle was used as the local Lutheran vicar's mansion from 1850 up to recent times.

The municipality is one of Sweden's largest, geographically, at around 8,000 km², or roughly the size of the historical province of Södermanland, which - compared to Pajala Municipality's population of approximately 6,500 - has more than one million inhabitants.

In Pajala is also Jupukkamasten, a 335 metre tall guyed mast for FM- and TV-transmission, which together with three other guyed masts of the same height is the tallest structure in Sweden.

There are four localities (or urban areas) in Pajala Municipality:

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