who discovered guam

The island of Guam was first reached by European explorers when Ferdinand Magellan arrived there on March 6, 1521, during his circumnavigation voyage for Spain.

However, the answer is a bit more nuanced:

• Indigenous Chamorro people had already inhabited Guam for about 3,500 years before any Europeans arrived, so they were the first discoverers and settlers of the island in human terms.

• In the context of “who discovered Guam” in many history books, the phrase usually refers to the first European to see and land on Guam, which was the Portuguese navigator Ferdinand Magellan sailing under the Spanish flag.

• Magellan’s arrival in 1521 marked the first recorded contact between Guam and Europe and turned the island into an important stop for later Spanish trans‑Pacific voyages.

So if you mean “who discovered Guam” in the traditional Eurocentric history sense: Ferdinand Magellan. If you mean “who first discovered and settled Guam as a homeland”: the Chamorro people, thousands of years earlier.

Information gathered from public forums or data available on the internet and portrayed here.