Marshall Dennehey, P.C.
Marshall Dennehey, P.C. is a law firm headquartered in Philadelphia, Pennsylvania, with 515 lawyers in the United States according to The Law360 400 (2026).
- Office
- Philadelphia, Pennsylvania
- Website
- marshalldennehey.com
- Practice areas
- Casualty, Professional liability, Health care, Workers' compensation
- Size
- 515 lawyers in the United StatesFirm-wide count, The Law360 400 (2026)
- Headquarters
- This office
- Traces its history to
- 1962
Philadelphia, Pennsylvania
Is this your firm?
Send corrections to hello@lawfirmwebagency.com. And if your website is not winning the clients this listing sends you, we can fix that in seven days.
About Marshall Dennehey, P.C.
Marshall Dennehey, P.C. is a law firm headquartered in Philadelphia, Pennsylvania, with 515 lawyers in the United States according to The Law360 400 (2026). Its main areas of practice include casualty, professional liability, health care and workers' compensation.
The directory lists 32 law firms in Philadelphia, Marshall Dennehey, P.C. among them, and 499 across Pennsylvania. By U.S. lawyer headcount, it ranks number 9 among the firms we list with an office in Philadelphia. We list Marshall Dennehey, P.C. in 2 cities. Ballard Spahr LLP is listed at nearly the same location.
More about the firm is on its website, marshalldennehey.com.
Firm profile
Marshall Dennehey is a civil defense litigation firm founded in Philadelphia in 1962, with its corporate headquarters on Market Street in that city. It has more than 500 attorneys in 19 offices across seven states from Connecticut and New York to Florida and Ohio, representing insurers, self-insured businesses, municipalities and professionals.
Marshall Dennehey, P.C. traces its history to 1962.
Source: marshalldennehey.com
Areas of practice
- Casualty
- Professional liability
- Health care
- Workers' compensation
From the firm's published profile.
Check a Lawyer's License in Pennsylvania
Lawyers who practice in Pennsylvania are licensed by The Disciplinary Board of the Supreme Court of Pennsylvania. Before you hire anyone at Marshall Dennehey, P.C., confirm that the lawyer is licensed and in good standing with its Look Up an Attorney.
Look Up an AttorneyLaw Firms Near Marshall Dennehey, P.C.
Largest Law Firms in Philadelphia
See all 32- 01Morgan, Lewis & Bockius LLP1,678 U.S. lawyersHeadquarters
- 02Morgan & Morgan1,270 U.S. lawyers2005 Market Street
- 03Fox Rothschild LLP1,009 U.S. lawyersHeadquarters
- 04Cozen O'Connor P.C.910 U.S. lawyersHeadquarters
- 05Duane Morris LLP806 U.S. lawyersHeadquarters
- 06Ballard Spahr LLP780 U.S. lawyersHeadquarters
- 07Blank Rome LLP770 U.S. lawyersHeadquarters
- 08Dechert LLP673 U.S. lawyersHeadquarters
Marshall Dennehey, P.C.: Questions and Answers
- Where is Marshall Dennehey, P.C. located?
- Marshall Dennehey, P.C. is in Philadelphia, Pennsylvania.
- How do I contact Marshall Dennehey, P.C.?
- The firm's website is marshalldennehey.com.
- What kind of law does Marshall Dennehey, P.C. practice?
- Casualty, Professional liability, Health care and Workers' compensation. From the firm's published profile.
- How many lawyers does Marshall Dennehey, P.C. have?
- Marshall Dennehey, P.C. has 515 lawyers in the United States, according to The Law360 400 (2026). That count covers the whole firm, not only its Philadelphia office.
- Where is Marshall Dennehey, P.C. headquartered?
- Marshall Dennehey, P.C. is headquartered in Philadelphia, Pennsylvania. This office is its headquarters.
- When was Marshall Dennehey, P.C. founded?
- Marshall Dennehey, P.C. traces its history to 1962, counting the oldest firm it grew from.
- Which law firms are near Marshall Dennehey, P.C.?
- The closest firms in the directory are Ballard Spahr LLP (same location), Blank Rome LLP (same location) and Cozen O'Connor P.C. (same location).
- How can I check that a lawyer at Marshall Dennehey, P.C. is licensed?
- Lawyers in Pennsylvania are licensed by The Disciplinary Board of the Supreme Court of Pennsylvania. Use its Look Up an Attorney at padisciplinaryboard.org to confirm a lawyer is licensed and in good standing.
For workers' compensation firms
How we build websites for workers' compensation firms in Philadelphia
Listing from © OpenStreetMap contributors, lawyer count from The Law360 400 (2026), last checked October 2026. LawFirmWebAgency is not affiliated with this firm, and a listing is not an endorsement or a measure of quality.
Is your firm the one people find first in Philadelphia?
Your listing tells a prospective client where you are. Your website decides whether they call. We build law firm websites that win that decision, live in seven days, with no monthly retainer.
- Where we work
- All 50 states
- Reply
- Within one business day