19 episodes · 2008

Season one began airing on September 29, 2008 and finished airing on November 10, 2008. The season included ten regular episodes and one special episode: "And Baby Makes 18", which aired on December 22, 2008. The show was known as 17 Kids and Counting for the entirety of this season.

13 episodes · 2009

Season two began airing on January 25, 2009 and finished airing on June 23, 2009. The season included twenty regular episodes and one one special episode: "A Very Duggar Wedding", which aired on January 25, 2009. The show's name was changed to 18 Kids and Counting part-way through the season.