The vast majority of Wix/Napa Gold 'spin on' filter applications continue to be made in the US. And in one instance, the Wix/NG 5/1334 anecdote posted last year showed recent production moved from Mexico to the US. That said, in the past used a made in Mexico NG 1334 noticed no drop of in quality.
As for the cartridge filter applications some made in Poland or Korea, many US based filter manufacturers have their cartridges made off shore, eg., S Korea, China. And there's one manufacturer often praised here that have spin on filter applications with Thai and China coo.