---
title: "Mary K. General Equity Presiding Judges Costello | KnowJudges"
canonical: "https://knowjudges.com/kyj/judge/mary-k-general-equity-presiding-judges-costello-nj-chair-hudson"
page_type: "judge_profile"
updated: "2026-10-07"
---

# Mary K. General Equity Presiding Judges Costello

New Jersey Superior Court, Hudson Vicinage · Presiding Judge

## Profile

- Court: New Jersey Superior Court, Hudson Vicinage
- State: New Jersey
- Role: Presiding Judge
- Service status: active
- Last verified: 2026-07-26

## Summary

Official statewide and applicable court procedural guidance applies to this judge.

## Before you appear

- Read the judge-specific standing order first when one is listed.
- Check the docket and case orders for requirements that supersede broader guidance.
- Confirm current remote-access and courtroom technology arrangements before the proceeding.

## Courtroom Rules

### media access and electronic devices

Scope: statewide

New Jersey statewide Supreme Court guidelines govern media access and electronic devices in courtrooms; recording, photography, broadcasting, and transmission require compliance with the published approval process and courtroom restrictions.

Evidence excerpt: Transmission, broadcasting, recording and/or photographing is prohibited at any proceeding closed by court order, statute, or Rule of Court.

[New Jersey Courts](https://www.njcourts.gov/sites/default/files/notices/2024/07/n240723a.pdf)
Source checked: 2026-07-26


## Sources

- [Official profile](https://www.njcourts.gov/public/directories/judges/all)
- [Official roster](https://www.njcourts.gov/public/directories/judges/all)
- [New Jersey Courts official judicial roster](https://www.njcourts.gov/public/directories/judges/all)
- [New Jersey Courts](https://www.njcourts.gov/sites/default/files/notices/2024/07/n240723a.pdf)

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## Biography

### Professional career

- Supreme Court Order: Officially designated as Hudson General Equity Presiding Judge effective April 1, 2021
- Mary K. Costello is the designated General Equity Presiding Judge for Hudson County (Vicinage 6) in the Superior Court of New Jersey, appointed by former Governor Jon S. Corzine in 2007
- The record notes that nJ Courts — Conference of General Equity Presiding Judges: Lists Costello as Hudson County’s designated presiding judge
- Presiding roles: held the role of presiding judge for both the Civil Division and General Equity Division in Hudson County

### Education


### Additional information




## Published courtroom rules

### Shared court rules

- [New Jersey Courts](https://knowjudges.com/courtroom-rules/national-shared-set-c9ef48d54ca091cafd206659) — Scope is limited to the court class in the source claim.  Shared court context only; case-type restrictions, exceptions, later amendments and case orders apply. This is not a personal preference or a complete rules inventory. [Official source](https://www.njcourts.gov/sites/default/files/notices/2024/07/n240723a.pdf). Collected 2026-07-26.