Her birth date and the fact that she was raised in Sheridan, Montana, are documented across her Harvard biography and press profiles, but every one of those sources describes Sheridan as where she was raised, not where she was born.
What would resolve this A memoir, interview or public statement from Karen King herself naming her actual birthplace.
OpenBiographical researchEncyclopaedia Britannica editors, Encyclopaedia Britannica (online academic reference)