Ontario's Old Hickory line with 1095 blades and hickory handle slabs, is all made in USA. I don't know about the modern "Sani-Safe" line.
Russell Green River's old timey carbon steel knives with wood (hickory?) handle slabs are made in USA, so far I know.
I believe Utica makes most of their current kitchen and tableware/flatware offerings in the USA. I don't know about the modern folders they have.
Bear and Son are made in USA.
Grohmann is based in Nova Scotia, Canada, and makes all their knives there.
Colonial are (allegedly) all made in USA. (however, no one but the employees at the plant, and upper corporate management know the location of the plant, and all are sworn to secrecy. The penalty must be pretty severe ... worse than mere loss of employment, I'm guessing, since no one is talking.)
GEC is all USA, but they are not a "large" manufacturer.
Zippo-Case, of course. I don't believe they have any products made offshore. They may get some components from offshore suppliers (brass, nickel silver, bone, pearl/abalone, horn, some woods, and other cover materials, simply because they are not produced domestically) but their knives are all USA.
Onida? I don't know where they are made or headquartered.
OP, In addition to the three car manufactures you mention in post number one, VW, Toyota, Nissan, Subaru, Fiat, Mercedes Benz, Audi, Porsche, and British Leyland/Land Rover, among others, have assembly plants in the USA.
I made deliveries to them when I drove an expedited truck. Some of the major component manufactures, such as Zypher (Zeffer? Zepher?) (transmissions) and Bosch (electronics/electrical, brakes, fuel systems, and more) also have plants here. I made pick ups at their docks, to take to "domestic" and "foreign" auto manufacturer's plants located in the USA.