The community actually straddled several islands that lay so close together that the space in between has since been filled, and is now considered as a single island. The southern part consists mostly of Smögen Island, which lies in the centre. Around this lies to the south Kleven, in the northwest Sandön, and in the northeast, Hasselön. The town is connected to the neighbouring town Kungshamn by Smögenbron (Smögen Bridge).
Smögen is mentioned for the first time towards the end of the 16th Century. The name of the community has varied over the years; amongst other names, from "Smögit", "Smöenn", "Smöget" and "Smygesund". The name has probably come from the Swedish word "smyghål", which translates as "sneak-hole" or "nook", referring to the narrow inlet between the Smögen island and where the harbour lies. Around the 17th Century, the island Hasselön was populated, and through the years this community has grown together with Smögen, and is today considered a part of the Smögen community.
Smögen is well known today for its long, wooden pier (around 600 meters), filled with shops in old fishing huts, which are frequented by a multitude of tourists during the summer. Smögen is one of the most popular tourist destinations on the Swedish West Coast, well known for its fish, prawns and other seafood, and one of Sweden's few fish markets is located here.