Hilton was born on February 17, 1981 in New York City, New York. Her mother, Kathy Hilton (née Kathleen Elizabeth Avanzino), is a socialite and former actress, and her father, Richard Howard "Rick" Hilton, is a businessman.

She is the oldest of four children: she has one sister, Nicholai Olivia "Nicky" Hilton (born 1983), and two brothers, Barron Nicholas Hilton II (born 1989) and Conrad Hughes Hilton III (born 1994). Her paternal great grandfather was Conrad Hilton, who founded the Hilton Hotels. She is of Norwegian, German, Italian (from a maternal great grandfather), English, and Irish ancestry.

Paris Hilton's Family Tree