The most common way is through naturalization, which is a lengthy and complex process that requires meeting certain criteria such as living in Switzerland for at least 10 years, having a clean criminal record, and demonstrating proficiency in at least one Swiss national language.

Getting Swiss citizenship is one of the most rigorous processes in the world and typically follows the "10-Year Rule." To apply for ordinary naturalization in 2026, you must have lived in Switzerland for at least 10 years and hold a Permanent Residence (C Permit). The process is unique because it happens at three levels: Federal, Cantonal, and Communal. You must demonstrate "successful integration," which includes proficiency in a national language (German, French, Italian, or Romansh) at a B1 oral and A2 written level. You must also prove you are not a threat to national security, have no criminal record, and have not been on social welfare in the past three years. "Facilitated Naturalization" is available for those married to a Swiss citizen (requiring 5 years of residency and 3 years of marriage). Many communes also require a "Citizenship Interview" where you are tested on local history and culture. It is a "social" process as much as a legal one, often requiring letters of recommendation from Swiss neighbors to prove you have truly integrated into the community.