Family
- father Dermot Neill: New Zealander who served in the British Army; family owned Neill & Company (now Wilson Neill & Co.), one of New Zealand's largest liquor wholesalers; died in 1991
- mother Priscilla Neill: British
- brother Michael Neill: older; born c. 1943
- sister Juliet Neill: younger; born c. 1950
- son Tim Neill: born in 1982; mother, Lisa Harrow
- step-daughter Maiko: mother, Noriko Watanbe
- daughter Elena Neill: born on January 10, 1991; mother, Noriko Watanbe
Companions
- Lisa Harrow: mother of Neill's son Tim; never married; acted together in "The Final Conflict" (1981)
