Atty. William J. Callanan

Atty. William J. Callanan

William J. Callanan is a lawyer practicing immigration, criminal defense, family.

Boston Boston 15 yrs experience 15 year
Call (857) 810-7266 Book Appointment

Profile Summary

About William J. Callanan at a glance

William J. Callanan is a criminal defense, family law, and immigration attorney based in Boston, Massachusetts. They have 15+ years of legal experience, licensed to practice since 2011. Admitted to practice in Massachusetts (2011). Serands clients in Boston, MA and the surrounding metropolitan area.

Verified attorney profile · Updated June 2026

About

  • William J. Callanan is a lawyer practicing immigration, criminal defense, family
  • William has been licensed for 15 years
  • William practices in Boston, MA

Practice Areas Explained

William J. Callanan's Areas of Practice

Each practice area below reflects the types of cases William J. Callanan handles, with a brief overview of what that area of law covers.

Criminal Defense

A criminal defense attorney protects your rights from arrest through trial. Find experienced lawyers handling DUI, drug, federal, theft, and violent-crime charges.

William J. Callanan is one of 214,270 criminal defense attorneys indexed nationally. Browse criminal defense attorneys in Massachusetts →

Family Law

Family law attorneys handle divorce, child custody, child support, adoption, prenups, and protective orders. Find verified family lawyers near you.

William J. Callanan is one of 187,066 family law attorneys indexed nationally. Browse family law attorneys in Massachusetts →

Immigration Law

Immigration attorneys help with green cards, visas, citizenship, asylum, and deportation defense. Find a verified immigration lawyer for your case.

William J. Callanan is one of 40,633 immigration attorneys indexed nationally. Browse immigration attorneys in Massachusetts →

Jurisdictional Context

Why local counsel matters in Massachusetts

Practicing law in Massachusetts. Legal matters in Massachusetts are governed by state-specific rules of civil and criminal procedure, statutes of limitations, and substantive law. Cases originating in Boston are typically filed in the local municipal court or the appropriate Massachusetts state district court, depending on subject matter and amount in controversy. An attorney licensed in Massachusetts 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 Massachusetts courts without local counsel or pro hac vice admission.

Looking for additional Massachusetts attorneys? Browse all attorneys in Boston or all attorneys in Massachusetts.

Frequently Asked

Common questions about William J. Callanan

Where is William J. Callanan's law office located?
William J. Callanan's law practice is located in Boston, Massachusetts. You can contact the office directly through this profile page.
What practice areas does William J. Callanan handle?
William J. Callanan focuses on criminal defense, family law, immigration. Each practice area listed reflects experience handling cases of that type in Massachusetts.
How long has William J. Callanan practiced law?
William J. Callanan has 15+ years of legal experience and has been licensed since 2011.
How can I contact William J. Callanan for a consultation?
You can contact William J. Callanan 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.

Bar Admissions

Massachusetts
Admitted: 2011

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