The 2018 E3 Harelbeke was a road cycling one-day race that took place on 23 March 2018 in Belgium.

It was the 61st edition of the E3 Harelbeke and the tenth event of the 2018 UCI World Tour.

[2][3] The race was won by Niki Terpstra (Quick-Step Floors), who stayed 20 seconds clear of an elite group, led home by his teammate Philippe Gilbert, with BMC Racing Team's Greg Van Avermaet completing the podium.

[4] As E3 Harelbeke was a UCI World Tour event, all eighteen UCI WorldTeams were invited automatically and obliged to enter a team in the race.

Seven UCI Professional Continental teams competed, completing the 25-team peloton.