I examine wellbeing and age in twenty advanced countries. Thirteen are from Northern Europe – Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Netherlands, Norway, Spain, Sweden and Switzerland, plus the five other major English-speaking countries Australia, Canada, New Zealand, the UK and the USA and one from Latin America and one from Asia – Argentina and Indonesia. Two datasets are examined for the US, the Behavioral Risk Factor Surveillance System and Household Pulse Surveys along with ten international datasets - the Eurobarometers, Gallup World Poll, Come Here, the World Values Survey, International Social Survey Programme, the European Social Survey, the EU-SILC survey, the Global Flourishing Study and Global Minds surveys. There is very strong evidence since 2020 that youth wellbeing is low in all of these countries and for each of them is found no matter how the data was collected, whether by interviewer or online. The evidence is similar whether happiness or unhappiness measures are used.