Contact cajon makers directly to find cajons made in the USA. Unfortunately most music stores and big online stores only carry imported brands. Buying a locally made cajon cyles your income back through your local economy. Below are links to over 50 cajon makers in the USA making stunning hand-crafted instruments.Cajons listed by region: Midwest Northeast Southeast Southwest Western
Your local cajon maker can help you choose the right model. A locally made cajon helps your local economy and demonstrates that you are thinking about and helping local craftsmen.
Listed above are links to the cajon drum builders in the USA as retrieved by Internet searches from March to June 2018. I am sure there are many others not listed. Please send me updates and correction if you have additional information. Thanks.
EXTRA: I'm always interested in sites that promote locally made products. If you are interested in camping gear made in the USA please check out American Gear Guide. He has links to every gear company making tents, backpacks, sleeping bags and more in the USA. A great example of helping people to buy local.