The most recent completed World Baseball Classic was in 2023 , and Japan won that tournament, beating the United States 3–2 in the final.

Since the 2026 World Baseball Classic is scheduled for March 4–17, 2026 and is either upcoming or still in progress as of now, there is no 2026 champion yet , so the latest confirmed answer to “who won the baseball world classic” is Japan in 2023.

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