2021 Bikini Bottom Mayoral Election (Under the Sea)

The 2021 Bikini Bottom Mayoral Election was the 57th quadrennial mayoral election in Bikini Bottom, the capital city of Pacifica. The National Rally candidate of local business owner Eugene H. Krabs defeated the Social Democratic candidate of local musician and labor union leader Squidward Q. Tentacles in the second round.

The first round was held on November 7, with the second being held on November 15. The first round was held concurrent with the 2021 Bikini Bottom City Council Elections.