Twann-Tüscherz or Douanne-Daucher in French is a municipality in the Biel/Bienne administrative district in the Canton of Bern in Switzerland . On 1 January 2010 the municipalities of Tüscherz-Alfermée and Twann merged into the municipality of Twann-Tüscherz.

Twann is first mentioned in 1185 as Duana and again in 1225 as Tuanna. Tüscherz is first mentioned around 1230 as Tusschiers and in 1267 as Tuschers while Alfermée was first mentioned in 1276 Alphermme.

Just outside the Twann railway station is a large and well preserved Neolithic lakeside settlement. It was discovered in the mid 19th century and in 1974-76 about 10% of the total site was excavated.