IRON COMPANY is a huge fitness equipment website. They were established in 1997 as one of the first ever online fitness equipment vendors. Not everything is made here, but they have a made in the USA page that easily filters to their American made products across a ton of categories. They have free weights, cardio equipment, barbells, flooring, kettlebells, weight plates, and lots of other good American made fitness equipment. Note – a lot of the products they feature are from other manufacturers (not themselves), so double check with the official brand for that product to make sure they are made in the USA, and potentially buy direct from them.