Was The Great Depression a worldwide crisis or only in USA?

It was a world wide depression.

Oh, it was only in the USA. Everyone else was completely unaffected. Hope this helped.

Every country that traded on the US dollar was affected - a mistake they should have learned from but didn't.

The Great Depression was a worldwide crisis; it affected nearly every country in the world, not just the USA.

It was a worldwide depression. But it was not the same everywhere. The timing of the Great Depression varied across the world; in most countries, it started in 1929 and lasted until the late 1930s.and some places were hid harder than others.

Started in the U.S., affected the whole world. The world must understand, America collapses, so does everybody else. 

World wide.