The nameAchtkarspelen, literally meaning "eightparishes", is derived from the original eight parishes within thegrietenij, namely: Augustinusga, Buitenpost (the capital), Drogeham, De Kooten, Kortwoude, Lutkepost, Surhuizum and Twijzel. Achtkarspelen held a separate status withinFriesland for many years. In theMiddle Ages Achtkarspelen fell under theBishopric of Münster, meanwhile the rest of Friesland was a part of theBishopric of Utrecht.
Thegrietenij Achtkarspelen became amunicipality in 1851 as a result of the Municipality Act of Minister of the InteriorJohan Rudolph Thorbecke.
^"Postcodetool for 9285NH".Actueel Hoogtebestand Nederland (in Dutch). Het Waterschapshuis. Archived fromthe original on 21 September 2013. Retrieved6 September 2013.