A large wizarding bookshop filled with shelves stacked to the ceiling, Flourish & Blotts is the primary supplier of textbooks for Hogwarts, though of course that's far from all they sell. The shop holds occasional book-signings and sells books via owl in addition to books purchased in-store. They also take advance orders for books that are in high demand.

This shop sells a wide variety of tricks and practical joke items. Although it is in direct competition with Weasley Wizarding Wheezes.

Partway down Diagon Alley, near its intersection with Knockturn Alley, stands an imposing snow-white marble building: Gringotts Wizarding Bank. "Towering over the other shops", it is the place where British witches and wizards store their money and other valuables, in vaults miles below ground. The vaults are heavily guarded. The centuries-old bank is run by goblins, and they alone know the secrets of the twisting underground passages and the enchantments (and creatures!) in place to defend against intruders.

Though far from the only wizarding clothier around, Madam Malkin's seems to be the best, as it is the place where most Hogwarts students purchase their robes. Madam Malkin's is located next door to Flourish & Blotts, and in addition to selling Hogwarts school robes, they also sell robes which are "spangled, self-ironing, beautifying, slimming, fattening, lengthening," and "temperature-adjusting" and they carry robes made by Whopperwear "for the outsize witch or wizard."

Magical Menagerie is a very crowded pet store. It is very noisy with the sounds of all types of animals including toads, rabbits, cats, and ravens.

"Makers of Fine Wands since 382 B.C," Ollivander's is a narrow and shabby little shop with a window display consisting of a single wand resting on a faded purple cushion. Inside the walls are lined floor to ceiling with thousands of narrow boxes, each holding a wand that is waiting to belong to some witch or wizard.

Potage's Cauldron Shop is the closest shop to the entrance from the alley behind the Leaky Cauldron. The shop sells all sorts of cauldrons.

Quality Quidditch Supplies is a store that offers everything a Quidditch Player or Quidditch Fan desires. From brooms and quidditch balls to authentic professional Quidditch team robes.

Scribbulus Everchanging Inks is located next door to Quality Quidditch Supplies The store sells ink, quills, and parchment.

Slug & Jiggers Apothecary is a fascinating shop crammed with all sorts of interesting things. There are barrels of slimy stuff lined up on the floor and jars of all sorts of powders, herbs, and the like along the walls. Bundles of feathers, fangs, and claws hang from the ceiling. The whole place smells very bad, a mixture of bad eggs and rotten cabbage.

Twilifitt and Tatting is an upscale clotherin store. They offer some of the finest cloths for making school robes, pants, and shirts.