Every wizard or witch entering Hogwarts must purchase a wand. Most go to the expert, Mr. Ollivander, in Diagon Alley. On Harry's trip to purchase items for his first year at Hogwarts, he enters that very shop. There he learns that his mother's wand was ten and a quarter inches long and made of willow. It did excellent charm work. Harry's father had a mahogany wand that was eleven inches long and was good for transfiguration.
Harry first tried a nine inch beechwood with dragon heartstrings. Next, he tried out a maple with phoenix feather wand. Again, it didn't seem to work out. This went on for quite awhile, until Ollivander pulled out a most curious wand. This one was made of holly with a phoenix feather, eleven inches long. Ollivander reveals that the phoenix who gave a feather for this wand gave a feather for another, too. That wand belonged to a young Tom Riddle, who became Voldemort. Harry later learns that the phoenix who gave the feathers is none other then Fawkes, Dumbledore's phoenix.
Harry also has ownership of another wand, the Elder Wand. The Elder Wand is one third of the Deathly Hallows, and has immense power. It was once wielded by the dark wizard Grindelwald, who lost it in his duel with Dumbledore. It is a dangerous object, and highly prized by any who know of its legends. Harry used it only once to repair his own wand, and then reburied it with Dumbledore. He hopes that if he dies a natural death, the power of the wand will fade as there will be no true master any longer.