North America Is a Continent—The United States Is a Country Within It

No. This confuses a continent with a country.

• North America is a continent comprising 23 sovereign nations (Canada, US, Mexico, Guatemala, Belize, Honduras, El Salvador, Nicaragua, Costa Rica, Panama, plus Caribbean island nations) and numerous territories.
• The United States of America is one country located in North America (occupying the central portion between Canada and Mexico).

Analogy

"Is Europe still part of France?" No. France is a country in Europe. Similarly, the US is a country in North America.

North America's 3 Largest Countries by Area

1. Canada (9.98M km²)
2. United States (9.83M km²)
3. Mexico (1.96M km²)

Together, they make up most of the continent's landmass and population (~500M).