The incident occurred close to the junction of Strand Road and Pennyburn Roundabout.
The PSNI has appealed for anyone who witnessed the collision to contact them.
Constable Mailey said : “It was reported that at around 9.50am at the junction of Strand Road and Pennyburn Roundabout a van was in collision with a pedestrian.
"The pedestrian, a man aged in his 70s, was taken to hospital for treatment following the collision.
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“We are appealing for anyone who may have witnessed the collision or may have information about the incident to contact Strand Road Police Station on the non-emergency number 101, quoting reference number 442 of the 11/11/2017.
"Or, if someone would prefer to provide information without giving their details they can contact the independent charity Crimestoppers and speak to them anonymously on 0800 555 111.”