Do most or all American citizens must pay taxes?

Most American citizens are required to pay federal income taxes if they earn above a certain income threshold, along with state and local taxes depending on where they live. However, there are some exceptions, such as individuals with very low income or specific tax exemptions. Additionally, certain groups, like some Native Americans and residents of certain U.S. territories, may have different tax obligations. Overall, while not all citizens may owe taxes, the vast majority do.