ok, straight from the horses mouth (reply from Leupold)
"All of our rifle scopes are built and assembled right here in
Beaverton, Oregon, by American workers. Because of the sheer volume of optical glass we require, however, we are forced to source that from different
places all over the world, whether it be in the U.S., Asia, or Europe.
There is currently no American glass manufacturer that can exclusively supply our needs for quality, sophistication of coating, and quantity. None of our rifle scopes are produced in China.