Lyss [LIS] (Bern German: [LIS]) is a municipality (municipality) in the Seeland administrative district in the Swiss canton of Bern. On 1 January 2011 the congregation merged Busswil bei Büren with Lyss. Lyss has over 13,000 inhabitants. Since the population is more than 10,000, to Lyss can also be described as a city. For the promotion of renewable energy Lyss was named, Energy City '. The rapidly developing regional center has preserved much of the Zeeland-village character.