U.S. State Department - Foreign Entry Requirements
U.S. Citizens entering: Aruba - passport or proof of U.S. citizenship required. Visa not required for stay up to 14 days, extendable to 90 days after arrival. Proof of onward/return ticket or sufficient funds for stay may be required. For further information contact:
Embassy of the Netherlands
4200 Linnean Ave. N.W.
Washington, D.C. 20008
202.244.5300
Canadian citizens face similar requirements.