Germany has outlined the minimum age requirement for foreign nationals seeking to become German citizens. Find out how old applicants must be to qualify.

Australia has outlined the minimum age requirement for foreign nationals seeking to become Australian citizens through its citizenship application process.

The United States has outlined the minimum age requirement for foreign nationals seeking citizenship through naturalisation. Here is how old applicants must be.

The UK has outlined the minimum age requirement for foreign nationals seeking British citizenship through naturalisation. Here is how old applicants must be.