New Jersey Statutes Title 40. Municipalities and Counties 40 § 19A-1

The governing body of any county of the third class may, by resolution or ordinance, as appropriate, provide for the establishment and maintenance of any of the county offices at any location within the county except that the following shall not be located without the county seat of the county, that is to say:

The county clerk's office;

The register's of deeds and mortgages office;

The sheriff's office;

The surrogate's office;

The county prosecutor's office; and

The places for holding the Superior Court within the county.

The governing body of a county may, upon the adoption of a resolution or ordinance, as appropriate, and after a public hearing, provide for the establishment of a county jail at any location within the county.