1971 Embassy British Indoor Championships

The 1971 Embassy British Indoor Championships was a combined men's and women's Grand Prix tennis tournament played on indoor carpet courts. The event was categorized as a B Class tournament and was the 4th edition of the British Indoor Championships in the Open era. The tournament took place at the Wembley Arena in London in England and ran from 23 October through 30 October 1971.

The men's singles event was won by unseeded Ilie Năstase who received 30 Grand Prix ranking points for his tournament victory. Billie Jean King won the women's singles title.

Men's singles
🇷🇴 Ilie Năstase defeated 🇦🇺 Rod Laver 3–6, 6–3, 3–6, 6–4, 6–4
 * It was Năstase's 6th title of the year and the 7th of his open era career.

Women's singles
🇺🇸 Billie Jean King defeated 🇫🇷 Françoise Dürr 6–1, 5–7, 7–5

Men's doubles
Bob Hewitt / Frew McMillan defeated 🇦🇺 Bill Bowrey / 🇦🇺 Owen Davidson 7–5, 9–7, 6–2

Women's doubles
🇫🇷 Françoise Dürr / 🇬🇧 Virginia Wade defeated 🇦🇺 Evonne Goolagong / 🇺🇸 Julie Heldman 3–6, 7–5, 6–3