Leen Looijen (born 9 July 1947) is a Dutch football manager, who has worked in N.E.C., NAC Breda, RKC Waalwijk, FC St. Gallen (Swiss), FC Emmen, Willem II, FC Groningen and Vitesse Arnhem.

From 1994 to July 2007 he served at the same club but as technical director, until this function was taken over by Carlos Aalbers.

He was also the national coach of the Dutch Antillean football.

Looijen coached the national football team of Tuvalu during their three tour of the Netherlands that started on August 16, 2013.

The Tuvaluan team trained almost every day in this period and played a total of 20 practice games against amateur clubs from around the country.