There is no country whose citizens do not need formal education. However, there are some countries that have very relaxed compulsory education laws. For example, in Finland, children are only required to attend school for 9 years, and there is no standardized testing. This means that children are free to learn at their own pace and in their own way. As a result, Finland has one of the best education systems in the world.

Another country with relaxed compulsory education laws is Norway. Children in Norway are only required to attend school for 10 years, and there is no national curriculum. This means that schools have a lot of freedom to decide how they teach their students. As a result, Norway also has a very good education system.

So, while there is no country where formal education is not required, there are some countries where the requirements are not as strict as in others. These countries tend to have very good education systems, which suggests that formal education is still important, even if it is not compulsory.