The 73-year-old retired entertainer, who has lived in Switzerland for nearly two decades, received her red Swiss passport with its distinctive white cross on it on Monday, Swiss newspaper Blick reported.
Swiss media reported in January that Turner had received approval for the citizenship from the municipality of Küsnacht, a picturesque town where she lives in a mansion overlooking Lake Zurich.
According to reports she was to hand in her US passport when she got her Swiss one.
She was quoted as saying that "I cannot imagine a better place to live" than in the European Alpine state, where privacy laws are strictly enforced.
Turner, who was born Anna Mae Bullock, had to learn German, pass a local civics test and interview to get her new citizenship.
She moved to Switzerland in 1995 when her longtime partner, German record executive Erwin Bach, was transferred here.
The couple is expected to marry in a few months' time, Blick reported.