US green card holder do i need a passport to enter the US or is my green card alone good enough?

Question

im traveling by air

Answer 1

Traveling by air, you must have valid passport of your country and green card.

Answer 2

nope, you need a passport from your country of citizenship

for example - i gots a green card but my citizenship is german, so i have to have a german passport :)

Hope it helps

Answer 3

What you need for the country that you're going to from the U.S. is up to that country, but all you need to return to the U.S. after a temporary absence of less than one year is your green card.

You are exempt the passport requirement upon your return to the U.S.