The Broncos are 1-4 heading in their bye week, and Fox announced Tebow would be the starter when Denver plays Oct. 23 at Miami.
He replaces Kyle Orton who started the first five games. He completed 91-of-155 passes for 979 yards, eight touchdowns and seven interceptions.
Tebow was inserted in Sunday's game, which ended in a 29-24 loss to the San Diego Chargers. He was 4-of-10 passing for 79 yards and a touchdown. He also ran for 38 yards and a score.
He appeared in nine games, starting three, as a rookie last season.
The trip to Miami will be a homecoming for Tebow, who was the 25th overall selection in the 2010 draft after a career at Florida in which he helped the Gators to Bowl Championship Series titles in 2007 and 2009. He won the Heisman Trophy after the 2007 season.