At least 35 others were injured after a man drove a vehicle into crowds celebrating new year in Bourbon Street in the city’s famous French Quarter.
In a statement, New Orleans & Company said it wished to send its “deepest condolences to the loved ones and victims of the terrorist attack” before thanking local police for their response to the incident.
“Let us be clear," said the tourism organisation. "Millions of visitors are drawn to New Orleans – and hundreds of thousands of us chose to live and work here – because of our welcoming people and our beautiful, inclusive culture.
"New Orleans is built to host major events, meetings, and conventions. Our preparation for upcoming events, and our community’s spirit and resilience, will not be deterred by this horrific act.”
New Orleans & Company added that "out of an abundance of caution", the Allstate Sugar Bowl had been postponed until Thursday 2 January at 3pm local time.
US authorities have confirmed an Islamic State group flag was found in the vehicle. The FBI has named the man driving the truck as 42-year-old Shamsud-Din Jabbar, a US citizen from Texas, understood to be a former soldier.
The UK Foreign Office set up a helpline to assist any British nationals affected by the attack.
