Judge Mary Miller Johnston: Professional Background and Legal Expertise

Appointed By: Gov. Ruth Ann Minner

Biography

The Hon. Mary Miller Johnston is a judge for the New Castle County Superior Court in Delaware. She was appointed to the bench by former Governor Ruth Ann Minner in 2003, filling a vacancy created by the passing of the Hon. Haile L. Alford.


Prior to her appointment, Johnston served as Chief Counsel of the Delaware Supreme Court’s Office of Disciplinary Counsel. While working in this capacity, she was tasked with prosecuting attorney discipline cases and unauthorized practice of law matters. Before that, she worked as a partner at Morris James, LLP, specializing in corporate and commercial litigation matters.


Johnston earned a B.A. in music from Wittenberg University. She continued her studies at Northwestern University, where she completed an M.A. in music. Johnston then received a J.D. from Washington and Lee University School of Law. As a law student, Johnston served as lead articles editor of the Law Review.


Her memberships have included the Richard S. Rodney Inn of Court, the Delaware State Bar Association’s Pro Se Litigation Assistance Committee, as well as the Delaware Supreme Court’s Permanent Advisory Committee on the Delaware Lawyers’ Rules of Professional Conduct, the Professional Committee, and the Court’s Commission on Continuing Legal Education.


Johnston has served as chair of the Delaware State Bar Association’s Women and the Law Section and president of the Board of Children & Families First. She has also sat on the Board of Governors of Wesley Theological Seminary.


She is a recipient of the Women’s Leadership Award from the Delaware State Bar Association.

Recent Cases by Hon. Mary Miller Johnston

On March 25, 2024 a debt / breach of contract case was filed in the jurisdiction of New Castle County. Judge Mary Miller Johnston presiding.

Filed

Mar 25, 2024

Status

NEW

Court

Superior

County

New Castle County, DE

Category

DEBT / BREACH OF CONTRACT

Practice Area

Creditor

Matter Type

General Creditor

Case Last Refreshed

Mar 26, 2024

On March 25, 2024 a personal injury case was filed in the jurisdiction of New Castle County. Judge Mary Miller Johnston presiding.

Filed

Mar 25, 2024

Status

NEW

Court

Superior

County

New Castle County, DE

Category

PERSONAL INJURY

Practice Area

Torts

Matter Type

Personal Injury

Case Last Refreshed

Mar 26, 2024

On March 22, 2024 a mortgage mediation case was filed in the jurisdiction of New Castle County. Judge Mary Miller Johnston presiding.

Filed

Mar 22, 2024

Status

NEW

Court

Superior

County

New Castle County, DE

Category

MORTGAGE MEDIATION

Practice Area

Property

Matter Type

Foreclosure

Case Last Refreshed

Mar 23, 2024

On March 20, 2024 a personal injury auto case was filed in the jurisdiction of New Castle County. Judge Mary Miller Johnston presiding.

Filed

Mar 20, 2024

Status

NEW

Court

Superior

County

New Castle County, DE

Category

PERSONAL INJURY AUTO

Practice Area

Torts

Matter Type

Automobile

Case Last Refreshed

Mar 21, 2024

On March 19, 2024 a personal injury auto case was filed in the jurisdiction of New Castle County. Judge Mary Miller Johnston presiding.

Filed

Mar 19, 2024

Status

NEW

Court

Superior

County

New Castle County, DE

Category

PERSONAL INJURY AUTO

Practice Area

Torts

Matter Type

Automobile

Case Last Refreshed

Mar 21, 2024

On March 18, 2024 a replevin case was filed in the jurisdiction of New Castle County. Judge Mary Miller Johnston presiding.

Filed

Mar 18, 2024

Status

NEW

Court

Superior

County

New Castle County, DE

Category

REPLEVIN

Practice Area

Creditor

Matter Type

Collections

Case Last Refreshed

Mar 19, 2024

On March 15, 2024 a personal injury auto case was filed in the jurisdiction of New Castle County. Judge Mary Miller Johnston presiding.

Filed

Mar 15, 2024

Status

NEW

Court

Superior

County

New Castle County, DE

Category

PERSONAL INJURY AUTO

Practice Area

Torts

Matter Type

Automobile

Case Last Refreshed

Mar 16, 2024

On March 14, 2024 a debt / breach of contract case was filed in the jurisdiction of New Castle County. Judge Mary Miller Johnston presiding.

Filed

Mar 14, 2024

Status

NEW

Court

Superior

County

New Castle County, DE

Category

DEBT / BREACH OF CONTRACT

Practice Area

Creditor

Matter Type

General Creditor

Case Last Refreshed

Mar 15, 2024

On March 13, 2024 a mortgage mediation case was filed in the jurisdiction of New Castle County. Judge Mary Miller Johnston presiding.

Filed

Mar 13, 2024

Status

NEW

Court

Superior

County

New Castle County, DE

Category

MORTGAGE MEDIATION

Practice Area

Property

Matter Type

Foreclosure

Case Last Refreshed

Mar 15, 2024

On March 13, 2024 a personal injury auto case was filed in the jurisdiction of New Castle County. Judge Mary Miller Johnston presiding.

Filed

Mar 13, 2024

Status

NEW

Court

Superior

County

New Castle County, DE

Category

PERSONAL INJURY AUTO

Practice Area

Torts

Matter Type

Automobile

Case Last Refreshed

Mar 14, 2024

On March 13, 2024 a civil miscellaneous (other) case was filed in the jurisdiction of New Castle County. Judge Mary Miller Johnston presiding.

Filed

Mar 13, 2024

Status

NEW

Court

Superior

County

New Castle County, DE

Category

CIVIL MISCELLANEOUS (OTHER)

Case Last Refreshed

Mar 14, 2024

On March 12, 2024 a personal injury auto case was filed in the jurisdiction of New Castle County. Judge Mary Miller Johnston presiding.

Filed

Mar 12, 2024

Status

NEW

Court

Superior

County

New Castle County, DE

Category

PERSONAL INJURY AUTO

Practice Area

Torts

Matter Type

Automobile

Case Last Refreshed

Mar 13, 2024

On March 8, 2024 a personal injury auto case was filed in the jurisdiction of New Castle County. Judge Mary Miller Johnston presiding.

Filed

Mar 08, 2024

Status

NEW

Court

New Castle County

County

New Castle County, DE

Category

PERSONAL INJURY AUTO

Practice Area

Torts

Matter Type

Automobile

Case Last Refreshed

Mar 11, 2024

On March 8, 2024 a medical malpractice case was filed in the jurisdiction of New Castle County. Judge Mary Miller Johnston presiding.

Filed

Mar 08, 2024

Status

NEW

Court

New Castle County

County

New Castle County, DE

Category

MEDICAL MALPRACTICE

Practice Area

Torts

Matter Type

Malpractice

Case Last Refreshed

Mar 11, 2024

On March 7, 2024 a debt / breach of contract case was filed in the jurisdiction of New Castle County. Judge Mary Miller Johnston presiding.

Filed

Mar 07, 2024

Status

NEW

Court

New Castle County

County

New Castle County, DE

Category

DEBT / BREACH OF CONTRACT

Practice Area

Creditor

Matter Type

General Creditor

Case Last Refreshed

Mar 10, 2024

On March 6, 2024 a mortgage commercial case was filed in the jurisdiction of New Castle County. Judge Mary Miller Johnston presiding.

Filed

Mar 06, 2024

Status

NEW

Court

New Castle County

County

New Castle County, DE

Category

MORTGAGE COMMERCIAL

Practice Area

Property

Matter Type

Foreclosure

Case Last Refreshed

Mar 08, 2024

On March 6, 2024 a personal injury auto case was filed in the jurisdiction of New Castle County. Judge Mary Miller Johnston presiding.

Filed

Mar 06, 2024

Status

NEW

Court

New Castle County

County

New Castle County, DE

Category

PERSONAL INJURY AUTO

Practice Area

Torts

Matter Type

Automobile

Case Last Refreshed

Mar 10, 2024

On March 5, 2024 a personal injury auto case was filed in the jurisdiction of New Castle County. Judge Mary Miller Johnston presiding.

Filed

Mar 05, 2024

Status

NEW

Court

New Castle County

County

New Castle County, DE

Category

PERSONAL INJURY AUTO

Practice Area

Torts

Matter Type

Automobile

Case Last Refreshed

Mar 09, 2024

On March 4, 2024 a personal injury auto case was filed in the jurisdiction of New Castle County. Judge Mary Miller Johnston presiding.

Filed

Mar 04, 2024

Status

NEW

Court

New Castle County

County

New Castle County, DE

Category

PERSONAL INJURY AUTO

Practice Area

Torts

Matter Type

Automobile

Case Last Refreshed

Mar 08, 2024

On March 1, 2024 a mortgage mediation case was filed in the jurisdiction of New Castle County. Judge Mary Miller Johnston presiding.

Filed

Mar 01, 2024

Status

NEW

Court

New Castle County

County

New Castle County, DE

Category

MORTGAGE MEDIATION

Practice Area

Property

Matter Type

Foreclosure

Case Last Refreshed

Mar 08, 2024

On February 29, 2024 a personal injury auto case was filed in the jurisdiction of New Castle County. Judge Mary Miller Johnston presiding.

Filed

Feb 29, 2024

Status

NEW

Court

New Castle County

County

New Castle County, DE

Category

PERSONAL INJURY AUTO

Practice Area

Torts

Matter Type

Automobile

Case Last Refreshed

Mar 02, 2024

On February 29, 2024 a malpractice case was filed in the jurisdiction of New Castle County. Judge Mary Miller Johnston presiding.

Filed

Feb 29, 2024

Status

NEW

Court

New Castle County

County

New Castle County, DE

Category

MALPRACTICE

Practice Area

Torts

Matter Type

Malpractice

Case Last Refreshed

Mar 01, 2024

On February 28, 2024 a personal injury auto case was filed in the jurisdiction of New Castle County. Judge Mary Miller Johnston presiding.

Filed

Feb 28, 2024

Status

NEW

Court

New Castle County

County

New Castle County, DE

Category

PERSONAL INJURY AUTO

Practice Area

Torts

Matter Type

Automobile

Case Last Refreshed

Feb 29, 2024

On February 27, 2024 a debt / breach of contract case was filed in the jurisdiction of New Castle County. Judge Mary Miller Johnston presiding.

Filed

Feb 27, 2024

Status

NEW

Court

New Castle County

County

New Castle County, DE

Category

DEBT / BREACH OF CONTRACT

Practice Area

Creditor

Matter Type

General Creditor

Case Last Refreshed

Feb 28, 2024

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