American made guitars are still some of the best. Fender, Gibson, PRS, Collings and more. All USA made and BIFL.
PS: Ukuleles from Hawaii (the "k" brands).
EDIT for clarity: I am specifically referring to the USA made models. Many companies, including Fender, Gibson and PRS (not Collings) sell less expensive models made in other countries.
A lot of fender guitars/basses are made in Indonesia and Mexico. Hell, some of the best fenders ever made were made in Japan and are highly sought after.
Same thing with Gibson. The others I don’t have any knowledge of.
I am specifically referring to the American made instruments. OP did not ask about the Japan, Mexico and Indonesia made, which are at this point undeniably well made.
Now that you mention it I'm struggling to come up with any other nation's brand of guitar. Like I know some low end budget Ovations are made in Korea, Fender makes their cheaper guitars in Mexico etc. but like...name me the Volkswagen or Toyota of guitars that's a home grown major international brand based outside the US?