ZURICH — Switzerland will hold a referendum on June 14, 2026, to vote on a proposal to cap the national population at 10 million. The Swiss People's Party introduced the population cap proposal and frames it as a matter of sustainability.

Switzerland's current population slightly exceeds 9 million, increasing from 8.3 million a decade ago. If the referendum passes, the government must deny entry to new arrivals, including asylum seekers and foreign residents' families, once the population reaches 9.5 million. Reaching a population of 10 million would legally require the Swiss government to terminate its free movement agreement with the E.U.

Switzerland is not a member of the E.U., but it has maintained a free movement agreement with the E.U. since 2002. Beat Jans, member of the Swiss Federal Council, said, "On June 14, we will experience Switzerland's Brexit moment, and a 'yes' vote would place the country in isolation."

More than 25% of Switzerland's residents are foreign-born, according to official government figures. The Swiss People's Party campaign website indicates that rapid national growth, driven by immigration, creates negative consequences across various sectors. The campaign website displays an image of a woman with a head covering holding a Swiss passport, which it labels as related to cultural identity loss. Jürg Müller, director of the Avenir Suisse think tank, said, "Tensions are visible in housing markets, infrastructure, and recreational areas, leading many residents to feel the country is overcrowded." Delphine Klopfenstein, Swiss Green Party parliament member, said, "The proposal is entirely xenophobic and turns foreign residents into scapegoats for social problems, which is both dangerous and misleading."

An early May poll indicated equal voter support for and opposition to the population cap. Polling firm gfs.bern reported that 52% of surveyed voters oppose the population limit. Swiss federal law requires initiatives to collect 100,000 signatures from eligible voters within an 18-month period to trigger a public referendum.