"If You Love Me (Let Me Know)" is a song written by John Rostill that was a 1974 hit single for Olivia Newton-John.

[2] As with her single "Let Me Be There", Mike Sammes sings a bass harmony.

[3] It was nominated for the 1974 Country Music Association Award for Single of the Year.

[4] Record World said that "Another John Rostill tune produced in the style of 'Let Me Be There' should guarantee a similar kind of success saga for her follow-up.

"[5] Newton-John performed the song along with Andy Gibb and ABBA on the 1978 ABC-TV special Olivia!.