Adafruit does their own assembly (pick and place / reflow) but not sure what PCB providers they have. There are US based PCB fabs.

Cyber City Circuits does small scale assembly in the US and seem like a cool company (ran into them from the Datasheet Digest podcast they put out). But yeah obviously they aren’t going to be able to match a $35 PCBA JLCPCB prototyping order.

https://cybercitycircuits.com/

I can tell you from first hand day job experience:

Electronic manufacturing in the US definitely exists. It also is low quality and 5x to 10x the cost of China.

An assembled board that costed us $825/unit in the US (and frequently had errors) costs $130/unit from China and they nailed it every time (probably because they machine QC rather than human QC). It's really not even close. Same goes for machined parts - drastically cheaper and higher quality from China.

I do mine in Detroit. There are five shops I can think of offhand.

I was in Montana once and stopped in to see a small PCB line. They were doing F22 and F35 PCBs.

Small USA PCB is everywhere.

Name them and share the prices with us.

Adco, Devron, Riverside, Altera, RBB, VAST, EMSG…

And that’s the ones I can think of within a couple hours of each other.

Name one