Your Criminal, DUI / OUI, Bankruptcy, & Foreclosure Defense Law Firm In East Longmeadow, Massachusetts

Premier Law Office & Personalized Legal Assistance

Contact Us Today

William J. O'Neil

Attorney At Law

Call Us Today

Put 37+ Years of Experience On Your Side


A judge 's gavel is sitting next to a piece of paper with a dollar sign on it.

Flexible Payment Plans

A black and white icon of a certificate with a ribbon.

Member of the National Trial Lawyers

A black and white icon of a man standing next to a scale.

When You Call, You Reach An Attorney

A black and white drawing of a phone with a sound wave coming out of it.

Free Consultation

A black and white drawing of a ribbon with a circle in the middle.

Proven Track Record Of Success

A scale of justice is sitting on top of a book.

The Law Office of William J. O'Neil

William O'Neil has practiced law in the greater Springfield area for over 37 years. He concentrates in criminal defense of major crimes. Attorney O'Neil provides the highest quality counsel on all felonies and misdemeanors to clients who are charged in State and Federal Courts. He has also defended hard working citizens who have been harassed by debt collectors by defending them in court against those creditors and in filing for bankruptcy protection. Receiving compassionate legal advice from our experienced professionals will prevent you from getting lost in the corporate shuffle. Attorney William O'Neil's office is conveniently located in East Longmeadow and offers plenty of free parking.

Learn More
The logo for the american association of premier dui attorneys
A logo for the national trial lawyers top 100 trial lawyers
The logo for the national association of criminal defense lawyers

We Can Help You With

A pair of handcuffs with a heart on them.

Criminal Defense

Defending you and your loved ones from unjust allegations

Learn More
A man is laying on the ground next to a car.

DUI / OUI Defense

Defending our clients against charges of driving/Operating Under The Influence

Learn More
A bank building with a dollar sign and an arrow pointing down.

Bankruptcy Law

Giving you and your family a financial fresh start

Learn More
A house with a hammer and a piece of paper next to it.

Foreclosure Defense

Compassionate foreclosure defense for your peace of mind

Learn More

Client Reviews

Experienced Legal Counsel

Meet Our Attorney

personalized Approach For all clients


The Law Office of William J. O'Neil is dedicated to providing outstanding legal services to our clients. Recognizing that each case is distinct, we offer a complimentary initial consultation to thoroughly assess your individual circumstances. Our team is committed to delivering personalized and attentive service, ensuring you have the support and guidance you need at every stage. With years of experience and a proven history of success, you can rely on our expertise to manage even the most intricate cases efficiently. At the heart of our values are transparency and open communication; we prioritize keeping our clients informed throughout the entire legal journey. We will clarify all of your options with honesty and transparency, empowering you to make informed decisions regarding your case. Choose The Law Office of William J. O'Neil for exceptional legal representation, grounded in a commitment to your best interests.

Read More