2021 Island X-Prix

The 2021 Island X-Prix (formally the 2021 Enel X Island X-Prix) was an Extreme E off-road race that was held on 23 and 24 October 2021 at Capo Teulada, in the Sulcis-Iglesiente region of the Italian island of Sardinia. It was the fourth round of the electric off-road racing car series' inaugural season. The final was won by championship leaders Molly Taylor and Johan Kristoffersson for the Rosberg X Racing team, ahead of Abt Cupra XE and JBXE.

Qualifying
Notes:
 * Tie-breakers were determined by Super Sector times.
 * – Team awarded 5 additional points for being fastest in the Super Sector.

Semi-final 1
Notes:
 * – Andretti United Extreme E originally got further in the lap than Team X44, but were classified last as a penalty for causing a collision.