HomeMassachusettsBostonPeter Merrigan

About Peter Merrigan

Peter M. Merrigan is the Managing Partner at Sweeney Merrigan Personal Injury Lawyers, LLP in Boston, where he practices alongside his brother attorney J. Tucker Merrigan and father Thomas T. Merrigan. He focuses on motor vehicle accidents, personal injury, maritime accidents, wrongful death, defective products, slip and fall, insurance disputes, and general liability accidents.

Merrigan earned his Juris Doctor cum laude from New England School of Law, and during law school served as a Rule 3:03 Prosecutor for Suffolk County at West Roxbury District Court. He has been named a Super Lawyers Top 40 Under 40 Trial Attorney and Rising Star (2015-2018) and recognized in The Best Lawyers in America 2024 for Mass Tort Litigation / Class Actions (Plaintiffs) and Product Liability Litigation (Plaintiffs).

Proven verdicts and settlements

$84.1 millionSettlement

Peter Merrigan of Sweeney Merrigan Personal Injury Lawyers represented 125 Massachusetts cities and towns in claims against Johnson and Johnson and the three largest opioid distributors, recovering $84.1 million in aggregate from the national opioid settlements.

Massachusetts / Federal Court · 2022Read the full story →
View all 2 proven verdicts →

Prior results do not guarantee a similar outcome. Each case is unique and depends on its own facts.

Practice areas

Bar admissions & credentials

State Bar of Massachusetts
Massachusetts Academy of Trial Attorneys
Boston Bar Association
Massachusetts Bar Association
National Lawyers Guild

Awards & recognition

Best Lawyers in America (2024)
Super Lawyers Top 40 Under 40 (2015-2018)
Super Lawyers Rising Star (2015-2018)

Other attorneys at Sweeney Merrigan Personal Injury Lawyers

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Proven verdicts and settlements from other Boston firms

Lubin & Meyer
Lubin & Meyer
$40 million · $40 Million Verdict for Family of Boy Left with Cerebral Palsy After Five-Hour Delivery Delay
Swartz & Swartz
Swartz & Swartz
$18.4 million · Federal Jury Awards $18.4 Million After Lahey Clinic Doctors Cancel HIV Test, Allowing AIDS to Develop
Sugarman & Sugarman
Sugarman & Sugarman
$30.55 million · $30.55 Million Verdict After Traveling Nurse Failed to Monitor Fetal Heart Rate at MGH
Thornton Law Firm
Thornton Law Firm
$300 million · $300 Million Settlement for Pension Funds Overcharged on Foreign Currency Trades
Breakstone, White & Gluck
Breakstone, White & Gluck
$56 million · $56 Million Verdict for Newburyport Man Left Amputee With Brain Injury After Amazon Van Crash