Published Thursday, 31 October 2013
Costumes definitely played a big part in the city's festivities and dressing up is practically mandatory, as the mayor knows all too well.
"The whole city gets dressed up and why not?" Martin Reilly tells UTV.
"We always do Halloween well!"
Derry's main event included a carnival of lost souls involving over 600 colourful and creepy characters parading along the city's Quayside.
The celebrations always culminate in a stunning fireworks display and this year was no exception.
Fans of the spooky holiday period have also been dressing up for Halloween fright nights at various events across Northern Ireland and around the world.
All Hallows Eve is celebrated around the world in different forms, with academics at odds over whether its roots are grounded in paganism or Christianity.
While some countries light-heartedly embrace all kinds of ghouls and monsters, for others there is a serious spiritual side and time to remember lost loved ones on All Souls Day or the Day of the Dead.
If you have been taking part in Halloween festivities, send your snaps to our gallery.
© UTV News