There are many villages in the municipality including Dypvåg, Fiane, Gjeving, Gødderstad, Grønland, Kilen, Klåholmen, Krokvåg, Laget, Lyngør, Nesgrenda, Østerå, Sagesund, Sandvika, and Songe.

The number of people in the municipality practically doubles in the summer, due to vacationers.

[8] On 1 January 1962, the Strengereid area (population: 375) of Tvedestrand was transferred to neighboring Moland municipality.

This means the arms have a blue field (background) and the charge is a tern, a type of local seabird.

The tern 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 blue color in the field and the tern were chosen to represent the sea since the municipality was historically dependent on it for its economy.

It is part of the Aust-Nedenes prosti (deanery) in the Diocese of Agder og Telemark.

Lying in the parish of Holt, Næs jernverk has one of the largest and most significant of the surviving mansions in Sørlandet, built by Ulrich Schnell.

Schnell bought up various iron works in the neighborhood and set up several sawmills in the district.

He obtained a special license to export timber directly from Tvedestrand, establishing the basis for an international harbor.

The municipal council (Kommunestyre) of Tvedestrand is made up of 23 representatives that are elected to four-year terms.

Tvedestrand has a temperate oceanic climate (Cfb, marine west coast), with autumn as the wettest season and spring as the driest.