The fonds consists of legal and administrative records produced by the County Courts of Prince Edward Island and span the years 1848 to 1977. Legal documents include extant dockets, court minutes, case papers, judgment books, land judgment books, insolvent court papers, and Naturalization papers. Administrative records of the court are included in the County clerks' records which consist of county court fees, day and writ books, journals, ledgers, correspondence, garnishee books, and various miscellaneous records filed and/or registered with the County clerks' offices. Judges' records consist of circuit books and minute books. Also included are Oaths of Office and Allegiance books which record such appointments as Justices of the Peace, magistrates, coroners, notaries, and registrars of deeds. With the exception of the judges' records, the documents included in this fonds were for the most part created and/or registered with the County Clerks or Assistant Clerks. This fonds is divided into three sous-fonds: Kings County, Queen's County, and Prince County.

This fonds consists of legal forms produced by the Magistrates' Courts in Prince Edward Island and span the years 1925 to 1959. Legal documents include Forms of Judgment for Poll Tax, "Schedule "T": Judgment against land forms, Informations, Warrants to Apprehend, Warrants Remanding Prisoner, Case papers, Executions, Warrants of Deliverance, and Warrants of Commitment. The documents included in this fonds were created by Justices of the Peace, Magistrates, or Stipendiary Magistrates serving in Prince Edward Island or their clerks. This fonds is divided into two series: Kings County and Prince County.

This fonds consists of administrative and financial records of the offices of the Sheriffs of King's County and of Prince County spanning the years 1885 to 1947. These records include process and execution books, ledgers, correspondence, lists of jurors, and other miscellaneous papers generated by the sheriffs' offices. This fonds is divided into two series: King's County records and Prince County records.