Americano vs. estadounidense vs. norteamericano

The Spanish words 'americano', 'estadounidense', 'norteamericano' are often used interchangeably to refer to something or someone from the United States. However, there are slight nuances in their usage depending on the regional context and specificity.

Americano

'Americano' is a broad term that can mean anything related to the entire American continent, including North, Central, and South America. But it is also used colloquially in many places to refer specifically to things or people from the United States.
El café americano es muy popular en todo el mundo.
(American coffee is very popular worldwide.)
Ella es una famosa actriz americana.
(She is a famous American actress.)

Estadounidense

'Estadounidense’ specifically refers to someone or something from the United States. It leaves no room for ambiguity as it clearly denotes something or someone from the USA.
La economía estadounidense es una de las más fuertes del mundo.
(The U.S. economy is one of the strongest in the world.)
Michael Jordan es un famoso baloncestista estadounidense.
(Michael Jordan is a famous American basketball player.)

Norteamericano

'Norteamericano' technically refers to anything related to North America, which includes countries like Canada and Mexico. However, in many contexts it’s used similarly to 'americano' and ‘estadounidense’, referring to the United States exclusively.
El águila calva es un símbolo norteamericano.
('The bald eagle is a North American symbol.)
La industria cinematográfica norteamericana es muy influyente.
(The North American film industry is very influential.)

Summary

'Americano', 'estadounidense', and 'norteamericano' can all refer to someone or something from the United States in Spanish, but their usage varies based on region and the level of precision needed. While 'americano' can widely mean anything related to America, 'estadounidense' distinctly signifies something or someone from the USA. And though 'norteamericano' should technically include all of North America (i.e., Canada, U.S., Mexico), it's often used to denote U.S. origins as well.