Halifax International Security Forum is an independent, nonpartisan, nonprofit organization headquartered in Washington, D.C. It is a forum and network for international government and military officials, academic experts, authors and entrepreneurs. Halifax Forum addresses global security issues. The forum is best known for its annual security summit at The Westin Nova Scotian in Halifax, Nova Scotia, Canada. The meeting brings together more than 300 delegates from over 70 countries and has been referred to by Canadian media as "The Davos of international security". This summit is the only event of its kind in North America. The 14th Halifax Forum was held from 19 to 21 November 2022.

The Westin Nova Scotian is a Canadian hotel located in Halifax, Nova Scotia, owned and operated by New Castle Hotels and Resorts. It was built in 1928 by the Canadian National Railway as the Nova Scotian Hotel and after several changes of owners and names in the late 20th century became the Westin Nova Scotian in 1996.