Not if you are a citizen of an EU or Schengen Area country which issues national identity cards, then you can enter Switzerland using that identity card. Otherwise you need a passport.
If you are entering Switzerland via the land borders there are not normally any passport / ID card checks, as Switzerland and all countries bordering it are members of the Schengen Area. But you still need to carry your passport or ID card as this is a legal requirement in Switzerland, and you might be unlucky and get asked to show it at the border.
It depends on your nationality. Switzerland is part of the Schengen Area. If you have an EU or Schengen area passport, there is no minimum validity. You can even travel to Switzerland on your national identity card, if you are from a country that issues them. If you are from a non-Schengen/EU country you need a validity of at least 3 months on your passport, and if you need a visa then you also need 2 blank pages on your passport.
No, an Irish passport holder does not need a visa to enter Switzerland for short stays of up to 90 days. Both Ireland and Switzerland are part of the Schengen Area, allowing for visa-free travel for tourist, business, or family visits. However, travelers should ensure their passport is valid for the duration of their stay.
Yes, you need a passport to travel to Europe.
Yes, you need a passport to travel to Paris.
You need a passport
Yes, you need a valid passport to travel to Australia.
No, you do not need a passport to travel to Florida if you are a U.S. citizen.
Yes, you need a valid passport to travel to India.
Yes, you need a valid passport to travel to Peru.
No, you do not need a passport to travel within the country.
No, you do not need a passport to travel to Arizona if you are a U.S. citizen.
Yes, you need a valid passport to travel to Brazil.