Atty. John L Longstreth

Atty. John L Longstreth

John L Longstreth is a lawyer practicing class action, antitrust, competition & trade regulation, appellate, constitutional and governmental litigation and 4 other areas of law. John received a degree from Harvard University in 1982, and has been licensed for 44 years.

Washington Washington 44 yrs experience 44 year
Call (240) 885-7614 Book Appointment

Profile Summary

About John L Longstreth at a glance

John L Longstreth is a Partner based in Washington, District of Columbia, practicing at K&L Gates LLP. They have 44+ years of legal experience, licensed to practice since 1982. Their practice focuses on business, class action, appellate, maritime, and energy. Admitted to practice in District of Columbia (1982), U.S. Court of Appeals for the Federal Circuit (1985), U.S. District Court for the District of Columbia and U.S. Court of Appeals for the District of Colum (1986), and U.S. Court of Appeals, Fourth Circuit U.S. District Court, Eastern District of Michigan U.S. Court o (1988). Educated at Harvard University (J.D. M.P.P., 1982) and Harvard University (M.P.P. Harvard, 1982). Serands clients in Washington, DC and the surrounding metropolitan area.

Verified attorney profile · Updated June 2026

About

  • John L Longstreth is a lawyer practicing class action, antitrust, competition & trade regulation, appellate, constitutional and governmental litigation and 4 other areas of law
  • John received a degree from Harvard University in 1982, and has been licensed for 44 years
  • John practices at K&L Gates LLP in Washington, DC

Practice Areas Explained

John L Longstreth's Areas of Practice

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

Business & Corporate Law

Business attorneys advise founders and growing companies on entity formation, contracts, financing, M&A, and dispute resolution.

John L Longstreth is one of 501,317 business attorneys indexed nationally. Browse business attorneys in District of Columbia →

Class Action

John L Longstreth is one of 26,424 class action attorneys indexed nationally. Browse class action attorneys in District of Columbia →

Appellate Practice

Appellate attorneys for civil and criminal appeals at state and federal court.

John L Longstreth is one of 86,319 appellate attorneys indexed nationally. Browse appellate attorneys in District of Columbia →

Maritime & Admiralty Law

Maritime attorneys for Jones Act claims, longshore injury, cruise ship cases, and offshore matters.

John L Longstreth is one of 11,568 maritime attorneys indexed nationally. Browse maritime attorneys in District of Columbia →

Energy & Utilities Law

Energy attorneys for oil & gas, renewables, utility regulation, and energy sector transactions.

John L Longstreth is one of 36,230 energy attorneys indexed nationally. Browse energy attorneys in District of Columbia →

Jurisdictional Context

Why local counsel matters in District of Columbia

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

Looking for additional District of Columbia attorneys? Browse all attorneys in Washington or all attorneys in District of Columbia.

Frequently Asked

Common questions about John L Longstreth

Where is John L Longstreth's law office located?
John L Longstreth's law practice is located in Washington, District of Columbia. The firm is K&L Gates LLP. You can contact the office directly through this profile page.
What practice areas does John L Longstreth handle?
John L Longstreth focuses on business, class action, appellate, maritime, energy. Each practice area listed reflects experience handling cases of that type in District of Columbia.
How long has John L Longstreth practiced law?
John L Longstreth has 44+ years of legal experience and has been licensed since 1982.
Where did John L Longstreth go to law school?
John L Longstreth earned their education at (J.D. M.P.P., 1982); (M.P.P. Harvard, 1982).
How can I contact John L Longstreth for a consultation?
You can contact John L Longstreth 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

J.D. M.P.P.
Harvard University
- 1982
M.P.P. Harvard
Harvard University
- 1982

Bar Admissions

District of Columbia
Admitted: 1982
U.S. Court of Appeals for the Federal Circuit
Admitted: 1985
U.S. District Court for the District of Columbia and U.S. Court of Appeals for the District of Colum
Admitted: 1986
U.S. Court of Appeals, Fourth Circuit U.S. District Court, Eastern District of Michigan U.S. Court o
Admitted: 1988

Reviews

These reviews belong to platform users; they do not constitute advertisement or promotion for the attorney. Opinions are published for informational purposes only.

No reviews yet.