Well, according to that, Shirley Plantation is the oldest business in the US, dating back to 1638. But they haven’t been a working plantation for like a hundred years.
Seems to me that Towle Silversmiths might be the oldest, dating from 1857 and still a division of some holding company.
While the OP specifies the US, here’s a thread we did a year ago about the oldest continuious operating biz in the world. I didn’t even reread it, just supplying the link.
There’s a farm in the little town in Connecticut (Fieldview Farm, Orange CT) where I grew up that’s been operated by the same family continuously since 1639. We used to buy milk from there when I was a kid.
I just have to mention Kongo Gumi,the 1400 year old temple builder just went out of business in 2008. I guess they just don’t build as many traditional temples these days. I find that sad.
Oh yeah, and just for a mention, Zildjian is an American company that originated in the Ottoman Empire in 1623, although they are more of a spinoff of the original company.
Zildjian, the cymbal manufacturer, claims to be the oldest continuously operating family-owned business in the United States. This magazine article backs up the claim and lists some other venerable companies, most of which are farms.
They still exist, although they’re not a family business anymore. They were bought by another company and are thus now a subsidiary, which raises questions of how you’re going to define “company”. The main reason for their financial difficulties was not lack of demand (demand has always been kind of low) but terrible investments made during the economic bubble of the 80s.
I can only imagine how it must feel to be the idiot who lost the company that was in the family for 14 centuries. If it were me, I’d seriously consider seppuku (or perhaps a less painful form of suicide).