Weyland-Yutani could have a factory in the outskirts of Lincoln City. Even though Lincoln City has ~21,000 people, it could still have some high tech industry (which Weyland-Yutani is).
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Alternatively, here are some places that could reasonably have a factory (not just in OR):
Hillsboro, OR
Beaverton, OR
Portland, OR
San Jose, CA
Santa Clara, CA
Palo Alto, CA
New York City, NY
Newark, NJ
Elizabeth, NJ
Paterson, NJ