Electronic Journal of Differential Equations, Conference 09 (2002), pp. 1-8. Title: On the $L^{\infty}$-regularity of solutions of nonlinear elliptic equations in Orlicz spaces Authors: Lahsen Aharouch (Faculte des Sciences Dhar-Mahraz, Maroc) Elhoussine Azroul (Faculte des Sciences Dhar-Mahraz, Maroc) Abdelmoujib Benkirane (Faculte des Sciences Dhar-Mahraz, Maroc) Abstract: Our main result is a maximum principle bounding the absolute values of the solution in terms of the supremum of the absolute values of the boundary data. Published December 28, 2002. Math Subject Classifications: 35J60. Key Words: Orlicz Sobolev spaces; boundary-value problems.