Many have dressed up their shop windows with spook-tacular displays.
The town’s very own ghost hunt also runs until November 1.
Ghosts will be hiding in 20 shop windows, with a further 20 making an appearance in Bailiffgate Museum & Gallery.
Take a look at these 11 spooky shop windows – if you dare!
1. Dirty Bottles
The Dirty Bottles is reputed to have a curse on it. The story of the dirty bottles from which it gets its name comes from the 18th century when a landlord is said to have gone to clean them and dropped down dead of a heart attack. The same thing happened to the next landlord so his wife proclaimed that they were cursed. The story stuck and they’ve been locked away since. No wonder they get a lot of interest from ghost hunters! Photo: Ian Smith
2. M A Tailoring
Hidden away on Bow Alley just a few yards from Alnwick Castle, you'll find M A Tailoring's Halloween shop window. Photo: Ian Smith
3. Victoria's Hair Salon
The spooky shop window at Victoria's Hair Salon on Fenkle Street. Photo: Ian Smith
4. Oxfam
The Halloween-themed window display at Oxfam on Narrowgate. Photo: Ian Smith