Estonia is the only other country which taxes citizens on foreign-earned income.

k0htlane · on Oct 6, 2015

A lot of countries tax foreign-earned income, but still US is a outlier along with Eritrea, with taxing foreign income of nonresident citizens.

brobinson · on Oct 6, 2015

Oops, I wrote Estonia instead of Eritrea. Too late to edit my comment.

Ahh, and I forgot to specify "non-resident". Sort by "taxes foreign income of non-resident citizens": http://i.imgur.com/hSsVmwd.png

Sorry.