For more information, see Democracy Countries, Democratic Index by Country, and V-Dem Democracy Index by Country.
Is the United States a republic rather than a democracy? The answer is both complex and arguably surprising. Types of government are not exclusive and often overlap with one another. Thus, many countries fit into multiple categories. This is the case in the United States, which is actually both a republic and a democracy—but a specific type of each.
A direct democracy has no elected officials and no constitution. The people have absolute power and make all decisions themselves via direct votes. While this may seem like an ideal system at first glance, direct democracy has one significant shortcoming: The lack of a constitution laying out basic guiding principles means that whatever at least 50.1% of the people want is what happens. There are no checks, no balances, and no limits. As such, a direct democracy offers little to no protection for up to 49.9% of the people, and leaves minorities particularly vulnerable.
However, a direct democracy is only one type of democracy. There exist many others. For example, representative democracies utilize elected officials just as republics do, and constitutional democracies adhere to a constitution (or Magna Carta or other founding document).
Therefore, while the United States definitely is not a direct democracy, it does fit the definition of a constitutional representative democracy.
“Republic” was originally used to describe any country whose ruler was not a tyrant—even if that ruler was a king or emperor. But in modern times, a republic is a country in which power is held by both the people and their elected representatives. Moreover, that power is limited by the laws established in a formal constitution, which preserves the rights of minorities and limits abuses of power.
For example, the United States constitution and its amendments include such safeguards as the distribution of power among three branches of government (executive, judicial, legislative), the Bill of Rights, and the abolition of slavery. Elected officials must adhere to the constitution’s rules.
Therefore, the United States also fits the definition of a republic. It is specifically a democratic republic, because the head of state is elected by the people, not by congress.
Given these definitions, it’s easy to understand why so much confusion exists.
Ultimately, those who say the United States is a republic and those who call it a democracy are both correct. The United States is a constitutional representative democracy, a democratic republic, and several other types of government as well.