Other villages in Sirdal include Bjørnestad, Haughom, Kvæven, Lunde, and Tjørhom.

On 1 January 1903, a small area of Sirdal (population: 63) was transferred to the neighboring municipality of Fjotland.

On 1 January 1987, the Virak and Espetveit areas of northern Flekkefjord (population: 41) were transferred to Sirdal municipality.

The official blazon is "Vert, three ptarmigans volant argent" (Norwegian: I grønt tre oppflygande sølv ryper, 2 - 1).

The ptarmigan has a tincture of argent which means it is commonly colored white, but if it is made out of metal, then silver is used.

The green color in the field and the ptarmigans were chosen as a symbol for the hills and moorland which make up the largest part of the municipality.

Lakes in the region include Gravatnet, Kulivatnet, Kvifjorden, Øyarvatnet, Rosskreppfjorden, Sirdalsvatnet, and Valevatn.

It shortened the distance from Oslo to Stavanger by 110 kilometres (68 mi) in the summer, and the road passes through barren, glacier-scoured highland.

The municipal council (Kommunestyre) of Sirdal is made up of 19 representatives that are elected to four year terms.

The tables below show the current and historical composition of the council by political party.

There are multiple alpine resorts and hotels in the valley, as well as cottages and camping spots.

The two sides of the valley, however, was established as one single parish in Christian times, even though it crossed county lines, something that was not very common in Norway.

Former lifestyles are visible in the farmhouse, a schoolhouse, stable, blacksmith's shop, barn, and mountain farm cottage as well as original equipment.