What country does bikini come from?

The US No, sorry, not the US. France! The US was testing the hydrogen bomb on the island of Bikini at the time (1946), and the bikini was named for this, which may have led to the confusion. In fact, US women disdained the bikini until after 1960, when Jack replaced Ike as US President, Rock & Roll music became more acceptable in the US, and US society became more casual. Many new inventions can be credited to the US, but the bikini is not one of them. In case the question refers to the island instead of the swimsuit, Bikini is part of a country known as the Marshall Islands.