Atty. John de Leon

Atty. John de Leon

John de Leon is a lawyer practicing business law, commercial law, contracts and 8 other areas of law. John received a degree from UC Berkeley SOL Boalt Hall, Berkeley, CA, and has been licensed for 18 years.

Rancho Cucamonga Rancho Cucamonga 18 Years Experience 18 year
Call (840) 256-4123

Profile Summary

About John de Leon at a glance

John de Leon is a contracts, trusts, probate, personal injury, and employment attorney based in Rancho Cucamonga, California. They have 18+ years of legal experience, licensed to practice since 2008. Admitted to practice in California (2008). Educated at University of California at Berkeley, Boalt Hall School of Law (JD, 2008) and UC Berkeley SOL Boalt Hall, Berkeley, CA Univ of Southern Calif, Los Angeles, CA (—). Serves clients in Rancho Cucamonga, CA and the surrounding metropolitan area.

Verified attorney profile · Updated June 2026

About

  • John de Leon is a lawyer practicing business law, commercial law, contracts and 8 other areas of law
  • John received a degree from UC Berkeley SOL Boalt Hall, Berkeley, CA, and has been licensed for 18 years
  • John practices in Rancho Cucamonga, CA

Practice Areas Explained

John de Leon's Areas of Practice

Each practice area below reflects the types of cases John de Leon handles, with a brief overview of what that area of law covers.

Contracts

John de Leon is one of 67,443 contracts attorneys indexed nationally. Browse contracts attorneys in California →

Trusts

John de Leon is one of 94,411 trusts attorneys indexed nationally. Browse trusts attorneys in California →

Probate

John de Leon is one of 115,645 probate attorneys indexed nationally. Browse probate attorneys in California →

Personal Injury

Personal injury attorneys help accident victims recover compensation for medical bills, lost wages, and pain & suffering. Most work on contingency — no fee unless you win.

John de Leon is one of 238,048 personal injury attorneys indexed nationally. Browse personal injury attorneys in California →

Employment Law

Employment lawyers represent workers in wrongful termination, discrimination, harassment, wage & hour disputes, and severance negotiations.

John de Leon is one of 151,622 employment attorneys indexed nationally. Browse employment attorneys in California →

Jurisdictional Context

Why local counsel matters in California

Practicing law in California. Legal matters in California are governed by state-specific rules of civil and criminal procedure, statutes of limitations, and substantive law. Cases originating in Rancho Cucamonga are typically filed in the local municipal court or the appropriate California state district court, depending on subject matter and amount in controversy. An attorney licensed in California brings working knowledge of local procedural deadlines, judicial practices in this venue, and the substantive law that applies to cases brought here. Out-of-state attorneys generally cannot represent clients in California courts without local counsel or pro hac vice admission.

Looking for additional California attorneys? Browse all attorneys in Rancho Cucamonga or all attorneys in California.

Frequently Asked

Common questions about John de Leon

Where is John de Leon's law office located?
John de Leon's law practice is located in Rancho Cucamonga, California. You can contact the office directly through this profile page.
What practice areas does John de Leon handle?
John de Leon focuses on contracts, trusts, probate, personal injury, employment. Each practice area listed reflects experience handling cases of that type in California.
How long has John de Leon practiced law?
John de Leon has 18+ years of legal experience and has been licensed since 2008.
Where did John de Leon go to law school?
John de Leon earned their education at (JD, 2008); (—).
How can I contact John de Leon for a consultation?
You can contact John de Leon directly through this profile page. Click "Ask the Attorney" to submit a question, or "Schedule a Consultation" to book a meeting. Most claimed-profile attorneys respond within one business day.

Education

JD
University of California at Berkeley, Boalt Hall School of Law
- 2008
UC Berkeley SOL Boalt Hall, Berkeley, CA Univ of Southern Calif, Los Angeles, CA
- In Progress

Bar Admissions

California
Admitted: 2008

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