The message of support from the IOC comes after it received a positive report from its Coordination Commission, which had been reviewing the work and planning for the 2002 Winter Games.
In the letter, IOC president Jacques Rogge and Salt Lake Organising Committee (SLOC) CEO Mitt Romney outline the significant measures in place to provide for the security of the athletes and other participants.
A security force totalling some 7,000 federal, state and local agents will be in place for the Salt Lake City Games with support from several thousand personnel from the US military.
In addition, the US government is allocating more than $200million (B222.27m) with a further $70m (B77.79m) coming from the State of Utah and the original security provision in the SLOC's budget.
Security fears over the Games have been voiced by many in the wake of the September 11 terrorist attacks on the US. Some had even questioned whether the Winter Games should go ahead although this suggestion was strongly refuted by the IOC.
Rogge and Romney stated in the letter of endorsement: "We fully believe the Olympic Winter Games should be an answer to violence, not a victim of it."
