Louis R. Cohen, Appellate Attorney in Washington, District of Columbia
focused on Appellate, Business, and Litigation
Washington, DC
Trusted appellate attorney serving Washington.
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Quick answer
Louis R. Cohen is an attorney based in Washington, DISTRICT OF COLUMBIA. The practice focuses on Appellate, Business, and Litigation.
- Based in
- Washington, DISTRICT OF COLUMBIA
- Experience
- attorney
- Known for
- Appellate · Business · Litigation
- Handles Appellate, Business, and Litigation matters from Washington, DISTRICT OF COLUMBIA.
- Recognized with Best Lawyers in America — Appellate Practice (2026).
About Louis R. Cohen: Louis R. Cohen is an attorney based in Washington, DISTRICT OF COLUMBIA. The practice focuses on Appellate, Business, and Litigation.
Areas of practice
Legal matters Louis takes on
Louis concentrates on appellate, business, litigation, and securities. Each area below outlines the kind of case Louis handles, typical outcomes to expect, and how the intake process starts.
Appellate
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Business
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Litigation
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Securities
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Appellate cases in Washington, District of Columbia
Louis takes appellate matters in Washington, District of Columbia. Typical engagements include intake calls to scope the issue, review of any records or filings you already have, and a written strategy memo before Louis agrees to represent you.
Business cases in Washington, District of Columbia
Louis takes business matters in Washington, District of Columbia. Typical engagements include intake calls to scope the issue, review of any records or filings you already have, and a written strategy memo before Louis agrees to represent you.
Litigation cases in Washington, District of Columbia
Louis takes litigation matters in Washington, District of Columbia. Typical engagements include intake calls to scope the issue, review of any records or filings you already have, and a written strategy memo before Louis agrees to represent you.
Securities cases in Washington, District of Columbia
Louis takes securities matters in Washington, District of Columbia. Typical engagements include intake calls to scope the issue, review of any records or filings you already have, and a written strategy memo before Louis agrees to represent you.
Biography
Meet Louis R. Cohen — appellate lawyer in Washington
Louis R. Cohen is an attorney based in Washington, DISTRICT OF COLUMBIA. The practice focuses on Appellate, Business, and Litigation.
Louis Cohen is a senior counsel in the firm's Litigation/Controversy Department, and a member of the Appellate and Supreme Court Litigation Practice Group. He joined the firm in 1967. Mr. Cohen served as Deputy Solicitor General of the United States from 1986-1988, and focuses on US Supreme Court and other appellate litigation and corporations law. Mr. Cohen’s appellate practice has included more than fifty cases on the merits in the US Supreme Court and a large number of cases in the courts of appeals. He has argued sixteen cases in the Supreme Court, winning fifteen.
Working with Louis on a appellate matter
Louis Cohen is a senior counsel in the firm's Litigation/Controversy Department, and a member of the Appellate and Supreme Court Litigation Practice Group. He joined the firm in 1967. Mr. Cohen served as Deputy Solicitor General of the United States from 1986-1988, and focuses on US Supreme Court and other appellate litigation and corporations law. Mr. Cohen’s appellate practice has included more…
Who Louis represents
Louis reviews new inquiries case-by-case for appellate, business, and litigation matters in Washington and the surrounding District of Columbia area.
Credentials
Education, bar admissions, and languages
Harvard University
— · 1966
Jurisdictions
Louis's state bar admissions
District of Columbia
ACTIVE
Louis studied at — in Harvard University.
Law school and academic background
Louis completed — in Harvard University. Formal legal training is one signal of substantive knowledge — the day-to-day practice Louis runs in District of Columbia is where that training gets applied to real client questions.
Recognition
Recognition and thought leadership
Louis has received 14 formal recognitions from bar associations, industry bodies, and peer-review services.
Best Lawyers in America — Appellate Practice
2026
Best Lawyers in America — Commercial Litigation
2026
Best Lawyers in America — Securities / Capital Markets Law
2026
Best Lawyers in America — Additional Areas of Practice:
2026
Best Lawyers in America — Antitrust Law
2026
Best Lawyers in America — Mergers and Acquisitions Law
2026
Best Lawyers in America — Special Focus:
2026
Best Lawyers in America — Supreme Court
2026
Best Lawyers in America — Awards:
2026
Best Lawyers in America — Pro Bono Advocacy Award, ACLU Foundation of Southern California
2026
Best Lawyers in America — National Trust for Historic Preservation - Public Policy Award
2026
Best Lawyers in America — "Highly recommended” in PLC’s 2003/04 Dispute Resolution Global Counsel Handbook - Public Policy Award
2026
Best Lawyers in America — Featured in an American Lawyer article identifying leading litigation departments (2002)
2026
Best Lawyers in America — Selected for inclusion in the 2012, 2013 and 2014 Washington DC Super Lawyer lists
2026
Legal awards and honors
Best Lawyers in America — Appellate Practice (2026). Best Lawyers in America — Commercial Litigation (2026). Best Lawyers in America — Securities / Capital Markets Law (2026). Best Lawyers in America — Additional Areas of Practice: (2026). Best Lawyers in America — Antitrust Law (2026). Best Lawyers in America — Mergers and Acquisitions Law (2026).
Locations
Louis R. Cohen's office in Washington
Louis's primary office is at 2100 Pennsylvania Avenue NW, Washington, District of Columbia, 20037. In-person meetings are by appointment; a phone intake usually comes first.
Client feedback
Client reviews of Louis R. Cohen
Louis has not yet collected verified client reviews on LawyersListed. Reviews here are all from confirmed clients; anonymous ratings are moderated out.
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Schedule your consultationHiring guide
How to hire Louis R. Cohen — what to expect in your first consultation
Working with a new appellate attorney should feel structured. Here's how the first two conversations with Louis usually go, from the moment you request a consult to the day representation begins.
Consultation formats and pricing
Louis charges for the initial consult. That fee is credited toward representation if you retain Louis's office.
What to bring to your first meeting
Bring any documents you already have — police reports, medical records, filed pleadings, correspondence from an insurer, a copy of the contract at issue. If you're not sure, err on the side of bringing everything; Louis will tell you what matters and what doesn't.
Questions to ask a appellate attorney in Washington, District of Columbia
A short list to run through before you commit: How many appellate matters have you handled in the last year? What's your fee structure? Who else in the office will work on this? What's your realistic estimate of timeline and range of outcomes? How do I reach you between meetings?
Fees & payment
Fees, payment methods, and consultation options for Louis
Louis discusses fees during intake so the arrangement fits the matter. Contingency, hourly, and flat-fee options are all common in appellate practice — ask which fits.
Hourly rates, contingency fees, and flat-fee options
Every appellate matter is priced differently. Simple document review might be a flat fee. Injury litigation is often contingency. Complex commercial disputes usually run hourly with a retainer. Louis confirms the model in the engagement letter before any work starts.
Payment methods and payment plans
Louis's office accepts standard payment methods. Ask about payment plans if the retainer is a stretch — many appellate practices work with clients on structured schedules.
Frequently asked
Frequently asked questions about Louis R. Cohen
How much does it cost to hire Louis for a appellate case?
Cost depends on the type of matter, the fee model (contingency, flat, hourly), and how contested the case becomes. Louis walks through the likely range during the consult so there are no surprises.
Does Louis offer a free consultation?
Louis charges for the initial consult; that fee is credited toward representation if you retain Louis's office. Some appellate attorneys offer free consults — check Louis's current terms during booking.
How long do appellate cases in District of Columbia typically take?
Simple appellate matters can wrap in a few weeks; disputed cases can run 6–18 months from intake to resolution, longer if the matter goes to trial. Louis gives a realistic estimate for your facts at the consult — vague answers here are a red flag.
Can Louis take my case if I'm outside Washington?
Louis is licensed in District of Columbia. Matters governed by District of Columbia law are the natural fit. Out-of-state matters are handled case-by-case, sometimes with local co-counsel. Ask during intake — Louis will tell you if the case is a fit or refer you to someone closer to your court.
What should I bring to my first meeting with Louis?
Bring every document that touches the dispute: contracts, correspondence, police or medical reports, filed pleadings, invoices, photographs, insurance letters. Also bring a written timeline of what happened, in your own words. Louis will filter what matters — over-preparing at intake is always cheaper than needing a second meeting.
Is Louis accepting new appellate clients right now?
Louis's intake status shifts week to week. Submit the form; the office will confirm availability or refer the matter out.
Areas served
Appellate attorneys serving Washington and Belize City in District of Columbia
Louis handles appellate matters throughout District of Columbia. Each city below is a direct link into the search page for verified appellate attorneys in that community.
More counsel
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