A magistrate was a public official similar to a judge. Several worlds used magistrates in their justice systems.
Bajor[]
In 2369, a Bajoran magistrate named Faren Kag informed Deep Space 9 that there was a medical emergency in his village and requested assistance. Commander Sisko sent Doctor Bashir and Chief O'Brien to aid the emergency. (DS9: "The Storyteller")
When Odo placed Nog and Jake in a cell, the Changeling told Nog he would be facing the magistrate for allegedly breaking into the quarters of a Tholian ambassador. (DS9: "Life Support")
In 2372, Quark tampered with the replicators on the USS Defiant and Deep Space 9, causing users of the replicators to see advertisements for his bar. While Quark attempted to rationalize and play down his actions, Odo sarcastically reassured him, "I'm sure the magistrate will take that into consideration when he calculates your fine." (DS9: "The Quickening")
In 2373, Odo told Quark he should keep his excuses for the magistrate, when one of Quark's under maintained holosuites had injured Captain Benjamin Sisko. (DS9: "Rapture")
In 2375, after Laas had killed a Klingon officer aboard DS9, General Martok requested that Laas be detained until the magistrate could determine whether to honor the Klingon Empire's request that Laas be extradited to their jurisdiction. (DS9: "Chimera")
The phrase "his village" was used in "The Storyteller," which implies that different villages may have their own magistrates, although there may also be different levels of magistrates on Bajor, such as the generic references on other occasions would imply. [1]
In a deleted scene from "Accession", Akorem Laan says he will ask the magistrate to be lenient with Vedek Porta for his killing of Imutta due to his belonging to an "unclean" caste. [2]
Barkon IV[]
Garvin, a Barkonian magistrate, and his daughter Gia encountered the malfunctioning Data in 2370. (TNG: "Thine Own Self")
The Federation[]
When an accident prematurely aged Molly O'Brien, Sisko explained the situation to a Federation magistrate, who wanted Molly taken to a center on Dalvos Prime for examination. (DS9: "Time's Orphan")
Tandar Prime[]
Jonathan Archer and Travis Mayweather had to undergo a hearing in front of the Tandaran magistrate on Tandar Prime in order to be cleared of espionage and released back to the Enterprise. (ENT: "Detained")
Klingon Empire[]
The Klingon Empire utilized magistrates during the mid-22nd century.
In 2152, a Klingon magistrate resided over the trial of Jonathan Archer on Narendra III. (ENT: "Judgment")
In 2154, a Klingon prisoner which was being prepped for genetic experimentation, demanded to see his magistrate. (ENT: "Affliction")
Talos IV[]
The Keeper also held the title of magistrate. (TOS: "The Cage")
Entharan homeworld[]
Entharan magistrates judged with a strong emphasis on preserving the business reputation of their species. (VOY: "Retrospect")
Sikaris[]
Magistrates held some authority in Sikarian culture. (VOY: "Prime Factors")
Mazar[]
In 2152, the Mazarites claimed that their magistrate wanted to question Vulcan ambassador V'Lar. (ENT: "Fallen Hero")
Mokra Order[]
Augris held the rank of third magistrate of the Mokra Order in 2372. (VOY: "Resistance")
Keto-Enol[]
Enolian magistrates were more lenient in their sentencing if a criminal showed compassion for his victims. (ENT: "Canamar")