The Bikini Bottom Police Department is the name law enforcement entity in Bikini Bottom. This includes officers, wardens, prison guards, SWAT Team, and riot guards. They keep the streets clean in Bikini Bottom like actual police officers. They first appeared as officers in Hall Monitor, asking Patrick if he has seen SpongeBob, or the "Maniac". The Prison Warden appeared in The Inmates of Summer, when he was working at Inferno Island along with Barney the Prison Guard. The Swat team was seen in The Thing, where they appeared to handle Smelly (Squidward), after attempting to attack Patrick. The prison guards appeared in Doing Time when Mrs. Puff was constantly calling them to come and get SpongeBob and Patrick when they were trying to get her to make a jail-break. It should be noted that some cops have been shown to be rather dimwitted. (ex. In Keep Bikini Bottom Beautiful, one officer kept assuming that Squidward was littering while it was clearly the other citizens).
The Bikini Bottom Police Department has established multiple locations to base their operations, as well as places to contain offenders of the law.
Police Headquarters
The station is where the cops stay and receive calls for crimes, which is seen in Life of Crime. They have a dispatcher unit somewhere in Bikini Bottom as well.
Bikini Bottom Prison
It is revealed in The SpongeBob SquarePants Movie that they have a prison for tiny criminals such as Plankton, in which he was taken to at the end of the movie.
The jail holds the regular criminals, for simple crimes such as littering, as the The Tattle-Tale Strangler had to stay for littering outside of the Krusty Krab, it holds major criminals as well, such as Plankton for trying to steal the Krabby Patty Formula, in which he has a pad-locked cell, which he easily breaks out of, as seen in Krabby Road.
Inferno Island is a high security prison, located in the middle of a body of water. The only way to get to it is to go there from the dock-yard, on a metal boat, to make sure there are no possible ways for prisoners to escape and swim to shore. The island is very harsh and the prisoners must sleep on hard beds with flat pillows.
A SquarePants Family Vacation - John was arrested for driving under the influence, driving while intoxicated, possession of drugs & alcohol, reckless driving, reckless endangerment, excessive speeding, hit and run and for resisting arrest.
Goo Goo Gas - Plankton was arrested for turning Mr. Krabs into a baby.
Krabby Road - Plankton was arrested for trying to steal the Krabby Patty Secret formula, then for breaking out of jail to steal it again.
Sweet and Sour Squid- The BBPD arrested Plankton when they saw him running around with Squidward's clairinet and assumed he was the one causing the "Musical disturbance" that many Bikini Bottom citizens have complained about when it was Squidward. When he was put in the police car, he exclaimed "Karen!!! Help!!!". Strangley, the policeman tilted Plankton's head forward and said "Watch your head" when Plankton had plenty of room fitting in the car due to his small stature.
Patty Caper - Mr. Krabs was arrested for, ironically, stealing the secret formula.
The Wreck of the Mauna Loa - Arrested for posing a danger to public safety by nearly killing everyone with the unsafe amusement park ride.
Growth Spout - Krabs was arrested for stealing one of Mrs. Puff's peanut worms from her garden thinking they were peanuts he was going to take to his overly hungry daughter Pearl (she was having, hence the title, a "growth spout")
Life of Crime - turned himself in, but instantly released.
The Smoking Peanut - Arrested for throwing a peanut at Clamu. He was most likely pardoned when Mr. Krabs turned out to be the true criminal.
Good Ol' Whatshisname - Patrick was arrested for an unknown reason, because he appeared in Squidward's cell.
Driven to Tears - Sentenced to 90 days in jail for littering. But was pardoned when Spongebob admitted he was the litterbug, and he was sentenced instead.