"Cis" was first used in the English language in 1994, when student Dana Defosse proposed its use in a Usenet group around trans topics. She argued that without an antonym to "trans", language implied trans people as Other. The adjective "cis" helped position cis as not the "norm".
The term started to catch on in scholarship around gender, and by the mid 2000s, it began to gain popularity. By 2014, "cisgender" became one of the gender options on Facebook. In 2015, it was added to the Oxford English Dictionary.