Guillaume Arnell (born 19 December 1962) is a member of the Senate of France.

An administrator by profession, he serves as a member of the Rassemblement Responsabilite Reussite (RRR).

In 1995, with the support of other committed young Saint-Martinois, Guillaume Arnell and Alain Richardson formed Ensemble pour Saint-Martin.

The list having won the elections, Alain Richardson becomes president of the community and Guillaume Arnell vice-president of the council.

He is responsible for the sustainable development division, which also has skills in housing, construction and town planning.