Atty. John Oliver Tannenbaum

Atty. John Oliver Tannenbaum

John Oliver Tannenbaum is a lawyer practicing estate planning, tax, business planning and 2 other areas of law. John received a degree from Boston University in 1975, and has been licensed for 54 years.

Hartford Hartford 54 yrs experience 54 year
Call (959) 777-3772 Book Appointment

Profile Summary

About John Oliver Tannenbaum at a glance

John Oliver Tannenbaum is a Member based in Hartford, Connecticut, practicing at John O. Tannenbaum Attorney at Law. They have 54+ years of legal experience, licensed to practice since 1972. Their practice focuses on criminal defense, estate planning, business, tax, and estate tax. Admitted to practice in New York (1972), U.S. Tax Court (1972), Connecticut (1980), and U.S. District Court, District of Connecticut (1980). Educated at Boston University (LL.M., 1975) and Brooklyn Law School (J.D., 1971). Recognitions include AV Preeminent. Serands clients in Hartford, CT and the surrounding metropolitan area.

Verified attorney profile · Updated June 2026

About

  • John Oliver Tannenbaum is a lawyer practicing estate planning, tax, business planning and 2 other areas of law
  • John received a degree from Boston University in 1975, and has been licensed for 54 years
  • John practices at John O. Tannenbaum Attorney at Law in Hartford, CT

Practice Areas Explained

John Oliver Tannenbaum's Areas of Practice

Each practice area below reflects the types of cases John Oliver Tannenbaum 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.

John Oliver Tannenbaum is one of 214,270 criminal defense attorneys indexed nationally. Browse criminal defense attorneys in Connecticut →

Estate Planning & Probate

An estate planning attorney prepares wills, trusts, powers of attorney, and healthcare directives to protect your family and pass on your assets.

John Oliver Tannenbaum is one of 226,536 estate planning attorneys indexed nationally. Browse estate planning attorneys in Connecticut →

Business & Corporate Law

Business attorneys advise founders and growing companies on entity formation, contracts, financing, M&A, and dispute resolution.

John Oliver Tannenbaum is one of 501,317 business attorneys indexed nationally. Browse business attorneys in Connecticut →

Tax Law

Tax attorneys handle IRS audits, tax debt, international tax, estate planning, and tax court litigation.

John Oliver Tannenbaum is one of 85,302 tax attorneys indexed nationally. Browse tax attorneys in Connecticut →

Estate & Gift Tax

John Oliver Tannenbaum is one of 3,765 estate tax attorneys indexed nationally. Browse estate tax attorneys in Connecticut →

Jurisdictional Context

Why local counsel matters in Connecticut

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

Looking for additional Connecticut attorneys? Browse all attorneys in Hartford or all attorneys in Connecticut.

Frequently Asked

Common questions about John Oliver Tannenbaum

Where is John Oliver Tannenbaum's law office located?
John Oliver Tannenbaum's law practice is located in Hartford, Connecticut. The firm is John O. Tannenbaum Attorney at Law. You can contact the office directly through this profile page.
What practice areas does John Oliver Tannenbaum handle?
John Oliver Tannenbaum focuses on criminal defense, estate planning, business, tax, estate tax. Each practice area listed reflects experience handling cases of that type in Connecticut.
How long has John Oliver Tannenbaum practiced law?
John Oliver Tannenbaum has 54+ years of legal experience and has been licensed since 1972.
Where did John Oliver Tannenbaum go to law school?
John Oliver Tannenbaum earned their education at (LL.M., 1975); (J.D., 1971).
How can I contact John Oliver Tannenbaum for a consultation?
You can contact John Oliver Tannenbaum 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.
What awards or recognition has John Oliver Tannenbaum received?
John Oliver Tannenbaum's notable recognition includes: AV Preeminent.

Education

LL.M.
Boston University
- 1975
J.D.
Brooklyn Law School
- 1971

Awards

AV Preeminent

Bar Admissions

New York
Admitted: 1972
U.S. Tax Court
Admitted: 1972
Connecticut
Admitted: 1980
U.S. District Court, District of Connecticut
Admitted: 1980
U.S. Court of Appeals, Second Circuit
Admitted: 1981

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