There are a total seven seasons of Spongebob Squarepants. Six seasons are completed, and we are currently in the seventh season. Seasons 1-6 have aired 20 thirty minute episodes each, and seasons 7 has so far aired nine episodes, with three that are already post-production. There are a total seven seasons of Spongebob Squarepants. <br /> <br /><br />Six seasons are completed, and we are currently in the seventh season. <br /><br /><br />Seasons 1-6 have aired 20 thirty minute episodes each, and seasons 7 has so far aired nine episodes, with three that are already post-production.