Judge Leonard E. Marquez - Professional Background & Legal Expertise

Biography

The Hon. Leonard E. Marquez is a judge for the Contra Costa County Superior Court in California. He was appointed to the bench by former Governor Jerry Brown in 2018. He filled the vacancy created by the retirement of the Hon. George V. Spanos (Ret.).

He is registered without party preference.

Judge Marquez graduated with his A.B. in politics from Princeton University. While at Princeton, Marquez was a member of the cheerleading squad for four years. He went on to earn his J.D. from the University of California, Los Angeles School of Law.

Prior to his appointment to the Superior Court, Marquez spent his entire legal career in private practice. He first worked as an associate at Wendel, Rosen, Black, and Dean LLP in 1999. During his nineteen years with the firm, Marquez would be named a partner in 2010 and would specialize in civil litigation including commercial landlord-tenant law, contract and lease disputes, and tort claims.

While on the bench, Judge Marquez has presided in the Criminal Division.

Some of his memberships have included the Contra Costa County Bar Association, the Hispanic Chamber of Commerce of Contra Costa County, the Festival of Latin Culture Committee, the California Hispanic Chambers of Commerce, the Donald P. McCullum Youth Court, and the East Bay La Raza Lawyers Association.

He has written several articles on subjects ranging from laws concerning evictions to intellectual property law.

Judge Marquez was born and raised in Pittsburg, California. In his free time, he is a Lego enthusiast. He not only enjoys building with Lego bricks, but he has also participated in local Lego conventions where he won a trophy for one of his entries.

Recent Cases by Hon. Leonard E. Marquez

CESAR RIOS VASQUEZ vs. ALEJANDRA FUENTES MENDOZA

On April 12, 2024 a case was filed in the jurisdiction of Contra Costa County. Judge Leonard E. Marquez presiding.

Filed

Apr 12, 2024

Status

Active

Judge

Hon. Leonard E. Marquez 👉 Discover key insights by exploring more analytics for Leonard E. Marquez

Court

Superior

County

Contra Costa County, CA

Case #

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Practice Area

Family

Matter Type

Other Parent-Child

Case Last Refreshed

Apr 12, 2024

Darrius William Carley, Jr. vs. Lyddia Crayton

On April 2, 2024 a case was filed in the jurisdiction of Contra Costa County. Judge Leonard E. Marquez presiding.

Filed

Apr 02, 2024

Status

Active

Judge

Hon. Leonard E. Marquez 👉 Discover key insights by exploring more analytics for Leonard E. Marquez

Court

Superior

County

Contra Costa County, CA

Case #

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Practice Area

Family

Matter Type

Other Parent-Child

Case Last Refreshed

Apr 09, 2024

KELCEE O'DANIEL vs. CODY MEREDITH

On March 28, 2024 a case was filed in the jurisdiction of Contra Costa County. Judge Leonard E. Marquez presiding.

Filed

Mar 28, 2024

Status

Active

Judge

Hon. Leonard E. Marquez 👉 Discover key insights by exploring more analytics for Leonard E. Marquez

Court

Superior

County

Contra Costa County, CA

Case #

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Practice Area

Family

Matter Type

Other Parent-Child

Case Last Refreshed

Apr 09, 2024

REYNA ESPINOZA vs. ALEJANDRO ESPINOZA

On March 25, 2024 a case was filed in the jurisdiction of Contra Costa County. Judge Leonard E. Marquez presiding.

Filed

Mar 25, 2024

Status

Active

Judge

Hon. Leonard E. Marquez 👉 Discover key insights by exploring more analytics for Leonard E. Marquez

Court

Superior

County

Contra Costa County, CA

Case #

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Practice Area

Family

Matter Type

Child Support

Case Last Refreshed

Mar 26, 2024

JUANA VALENZUELA ALVENO vs. SERGIO SALAZAR QUIIX

On March 19, 2024 a case was filed in the jurisdiction of Contra Costa County. Judge Leonard E. Marquez presiding.

Filed

Mar 19, 2024

Status

Active

Judge

Hon. Leonard E. Marquez 👉 Discover key insights by exploring more analytics for Leonard E. Marquez

Court

Superior

County

Contra Costa County, CA

Case #

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Practice Area

Family

Matter Type

Divorce,Separation

Case Last Refreshed

Mar 19, 2024

Rosa Serrano Gonzalez vs. Ricardo Cruz Roldan

On March 14, 2024 a case was filed in the jurisdiction of Contra Costa County. Judge Leonard E. Marquez presiding.

Filed

Mar 14, 2024

Status

Active

Judge

Hon. Leonard E. Marquez 👉 Discover key insights by exploring more analytics for Leonard E. Marquez

Court

Superior

County

Contra Costa County, CA

Case #

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Practice Area

Family

Matter Type

Other Parent-Child

Case Last Refreshed

Apr 09, 2024

DAY'MISHANIQUE TURNER vs. JASANI MCKINNEY

On March 7, 2024 a case was filed in the jurisdiction of Contra Costa County. Judge Leonard E. Marquez presiding.

Filed

Mar 07, 2024

Status

Active

Judge

Hon. Leonard E. Marquez 👉 Discover key insights by exploring more analytics for Leonard E. Marquez

Court

Superior

County

Contra Costa County, CA

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Practice Area

Family

Matter Type

Other Parent-Child

Case Last Refreshed

Apr 09, 2024

JUAN CARLOS VARGAS MARIN vs. MIREILLE HALL VON-TRAPP

On February 15, 2024 a case was filed in the jurisdiction of Contra Costa County. Judge Leonard E. Marquez presiding.

Filed

Feb 15, 2024

Status

Active

Judge

Hon. Leonard E. Marquez 👉 Discover key insights by exploring more analytics for Leonard E. Marquez

Court

Superior

County

Contra Costa County, CA

Case #

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Practice Area

Family

Matter Type

Other Parent-Child

Case Last Refreshed

Apr 09, 2024

DANIEL SALAS vs. TIARA SMITH

On February 5, 2024 a case was filed in the jurisdiction of Contra Costa County. Judge Leonard E. Marquez presiding.

Filed

Feb 05, 2024

Status

Active

Judge

Hon. Leonard E. Marquez 👉 Discover key insights by exploring more analytics for Leonard E. Marquez

Court

Superior

County

Contra Costa County, CA

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Practice Area

Family

Matter Type

Other Parent-Child

Case Last Refreshed

Apr 09, 2024

AESHA HELMAND vs. TONY HELMAND

On February 2, 2024 a case was filed in the jurisdiction of Contra Costa County. Judge Leonard E. Marquez presiding.

Filed

Feb 02, 2024

Status

Active

Judge

Hon. Leonard E. Marquez 👉 Discover key insights by exploring more analytics for Leonard E. Marquez

Court

Superior

County

Contra Costa County, CA

Case #

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Practice Area

Family

Matter Type

Divorce,Separation

Case Last Refreshed

Feb 03, 2024

TANIA JOSELIN HERNANDEZ HERNANDEZ vs. ERNESTO VASQUEZ HERNANDEZ

On January 29, 2024 a case was filed in the jurisdiction of Contra Costa County. Judge Leonard E. Marquez presiding.

Filed

Jan 29, 2024

Status

Active

Judge

Hon. Leonard E. Marquez 👉 Discover key insights by exploring more analytics for Leonard E. Marquez

Court

Superior

County

Contra Costa County, CA

Case #

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Practice Area

Family

Matter Type

Other Parent-Child

Case Last Refreshed

Apr 09, 2024

TRUE ALLAH vs. TOMPKINS MIQUELA

On January 26, 2024 a case was filed in the jurisdiction of Contra Costa County. Judge Leonard E. Marquez presiding.

Filed

Jan 26, 2024

Status

Active

Judge

Hon. Leonard E. Marquez 👉 Discover key insights by exploring more analytics for Leonard E. Marquez

Court

Superior

County

Contra Costa County, CA

Case #

(Subscribe to View)

Practice Area

Family

Matter Type

Divorce,Separation

Case Last Refreshed

Feb 01, 2024

Yeimy Ramos Beltran vs. Idelmy Beltran Mejia

On January 22, 2024 a case was filed in the jurisdiction of Contra Costa County. Judge Leonard E. Marquez presiding.

Filed

Jan 22, 2024

Status

Active

Judge

Hon. Leonard E. Marquez 👉 Discover key insights by exploring more analytics for Leonard E. Marquez

Court

Superior

County

Contra Costa County, CA

Case #

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Practice Area

Family

Matter Type

Other Parent-Child

Case Last Refreshed

Jan 27, 2024

HENRY SIRES vs. RAMONA VAIFANUA

On January 18, 2024 a case was filed in the jurisdiction of Contra Costa County. Judge Leonard E. Marquez presiding.

Filed

Jan 18, 2024

Status

Active

Judge

Hon. Leonard E. Marquez 👉 Discover key insights by exploring more analytics for Leonard E. Marquez

Court

Superior

County

Contra Costa County, CA

Case #

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Practice Area

Family

Matter Type

Other Parent-Child

Case Last Refreshed

Apr 09, 2024

Mia MARTINEZ PAREDES vs. Flor de Maria PAREDES CORNEJO

On December 28, 2023 a case was filed in the jurisdiction of Contra Costa County. Judge Leonard E. Marquez presiding.

Filed

Dec 28, 2023

Status

Active

Judge

Hon. Leonard E. Marquez 👉 Discover key insights by exploring more analytics for Leonard E. Marquez

Court

Superior

County

Contra Costa County, CA

Case #

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Practice Area

Family

Matter Type

Other Parent-Child

Case Last Refreshed

Jan 17, 2024

Martin Rodriguez vs. Elika Rodriguez

On December 28, 2023 a case was filed in the jurisdiction of Contra Costa County. Judge Leonard E. Marquez presiding.

Filed

Dec 28, 2023

Status

Active

Judge

Hon. Leonard E. Marquez 👉 Discover key insights by exploring more analytics for Leonard E. Marquez

Court

Superior

County

Contra Costa County, CA

Case #

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Practice Area

Family

Matter Type

Divorce,Separation

Case Last Refreshed

Jan 18, 2024

AMIR NASSAB vs. MARISSA MATIAS

On December 20, 2023 a case was filed in the jurisdiction of Contra Costa County. Judge Leonard E. Marquez presiding.

Filed

Dec 20, 2023

Status

Active

Judge

Hon. Leonard E. Marquez 👉 Discover key insights by exploring more analytics for Leonard E. Marquez

Court

Superior

County

Contra Costa County, CA

Case #

(Subscribe to View)

Practice Area

Family

Matter Type

Divorce,Separation

Case Last Refreshed

Dec 21, 2023

Jose Martinez vs. Alma Garcia

On December 19, 2023 a case was filed in the jurisdiction of Contra Costa County. Judge Leonard E. Marquez presiding.

Filed

Dec 19, 2023

Status

Active

Judge

Hon. Leonard E. Marquez 👉 Discover key insights by exploring more analytics for Leonard E. Marquez

Court

Superior

County

Contra Costa County, CA

Case #

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Practice Area

Family

Matter Type

Other Parent-Child

Case Last Refreshed

Jan 13, 2024

CAROL ARCHIE vs. LOUIS WRIGHT, Jr.

On December 7, 2023 a case was filed in the jurisdiction of Contra Costa County. Judge Leonard E. Marquez presiding.

Filed

Dec 07, 2023

Status

Active

Judge

Hon. Leonard E. Marquez 👉 Discover key insights by exploring more analytics for Leonard E. Marquez

Court

Superior

County

Contra Costa County, CA

Case #

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Practice Area

Family

Matter Type

Custody,Visitation

Case Last Refreshed

Dec 08, 2023

Jonathan Maldonado vs. Enemecio Mejia

On December 1, 2023 a case was filed in the jurisdiction of Contra Costa County. Judge Leonard E. Marquez presiding.

Filed

Dec 01, 2023

Status

Active

Judge

Hon. Leonard E. Marquez 👉 Discover key insights by exploring more analytics for Leonard E. Marquez

Court

Superior

County

Contra Costa County, CA

Case #

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Practice Area

Family

Matter Type

Other Parent-Child

Case Last Refreshed

Dec 27, 2023

Christopher Garces vs. Teresa Garces

On November 14, 2023 a case was filed in the jurisdiction of Contra Costa County. Judge Leonard E. Marquez presiding.

Filed

Nov 14, 2023

Status

Active

Judge

Hon. Leonard E. Marquez 👉 Discover key insights by exploring more analytics for Leonard E. Marquez

Court

Superior

County

Contra Costa County, CA

Case #

(Subscribe to View)

Practice Area

Family

Matter Type

Divorce,Separation

Case Last Refreshed

Dec 08, 2023

KARLI FILIBERTI vs. ROBERT FILIBERTI

On October 26, 2023 a case was filed in the jurisdiction of Contra Costa County. Judge Leonard E. Marquez presiding.

Filed

Oct 26, 2023

Status

Active

Judge

Hon. Leonard E. Marquez 👉 Discover key insights by exploring more analytics for Leonard E. Marquez

Court

Superior

County

Contra Costa County, CA

Case #

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Practice Area

Family

Matter Type

Divorce,Separation

Case Last Refreshed

Oct 27, 2023

Ana Hernandez Gaytan vs. Arnulfo Romero-Mendez

On July 20, 2023 a case was filed in the jurisdiction of Contra Costa County. Judge Leonard E. Marquez presiding.

Filed

Jul 20, 2023

Status

Judgment (Other)

Judge

Hon. Leonard E. Marquez 👉 Discover key insights by exploring more analytics for Leonard E. Marquez

Court

Superior

County

Contra Costa County, CA

Case #

(Subscribe to View)

Practice Area

Family

Matter Type

Divorce,Separation

Case Last Refreshed

Jan 26, 2024

WILMER MORALES VS. SELENE MORALES

On March 7, 2022 a dissolution with minor children case was filed in the jurisdiction of Contra Costa County. Judge Marquez, Leonard E presiding.

Filed

Mar 07, 2022

Status

Dismissal

Judge

Hon. Marquez, Leonard E 👉 Discover key insights by exploring more analytics for Marquez, Leonard E

Court

Contra Costa County

County

Contra Costa County, CA

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About

Leonard E. Marquez
Current Appointment Contra Costa County Superior Court, Department 34	Contra Costa County Superior Court, Department 34
Education A.B., Princeton University J.D., University of California, Los Angeles School of Law	A.B., Princeton University J.D., University of California, Los Angeles School of Law