Zachary Walker Hanson is an American musician, and member of the popular 1990s teen band Hanson. He was born in Arlington, Virginia, on October 22, 1985 into a family of four (his parents Walker and Diana Hanson, and brothers Isaac and Taylor). Zac was followed by his sisters Jessica, Avery and Zoe and brother Mackenzie. Earlier on, however, because of his father's job as an oil worker in Tulsa, Oklahoma, the family moved to places such as Ecuador, Venezuela and Trinidad and Tobago before moving back to Tulsa.

Zac, Taylor, and Isaac were raised on music from the 1950s and 1960s and grew to love it. The boys started singing together almost as soon as Zac could talk. In 1992, the boys' parents realized their children had a special talent and helped them to make their first independent album, Boomerang. The album was sold at live shows the boys held—basically just them singing a cappella verisons of the old songs they were raised on. As the boys and their talents grew, so did their interest in the pursuit of a musical career. Isaac, who had always idolized Chuck Berry, took up guitar. Taylor (who along with Ike had taken classical piano lessons) went to the keyboards and Zac got a set of drums from a friend's attic.

The boys released a second independent record called MMMBop. Then, one day during a summer show the boys ran into the man that would later sign them onto the Mercury record label. In May of 1997, the boys' first professional album, Middle of Nowhere was released. The boys also released an album called Snowed In, in 1997, which contains Christmas songs and a live album called Live From Albertane, in 1998, which contained songs from the Albertane Tour in the summer of 1998. They then released another called This Time Around in 2001. In 2004, Hanson released their newest album Underneath on their self-run record label, 3CG Records .

Zac loves video games and owns a PlayStation 2 and two Xboxes. He is also a big Lord of the Rings fan.

Zac is currently engaged to his long-time girlfriend, Kate Tucker, of Georgia who is also the best friend of Zac's sister-in-law, Natalie Hanson (wife to Taylor).