Lego currently has factories in North America, Europe and Asia[1]. Their PDF says the China factory supplies China and the rest of Asia; but I think supply isn't as regimented as suggested, I recall seeing more than just Henco in Mexico on my recently purchased sets in the US (I think I've gotten things made in Hungary and Czech Republic).
chvid|1 year ago
toast0|1 year ago
[1] https://www.lego.com/cdn/cs/aboutus/assets/blt79cd916d0945ea...