New York attorney record · Judicial Dept 1
William Sisson Barrett
Harvard alumna, admitted to the New York bar in 1975, registered office in Boston, MA. A half-lifetime's worth of status, address, and registration history on this record come straight from the NY Office of Court Administration.
- 1975
- Admitted
- 51
- Years in bar
- 1526953
- NY reg #
The record in one line
William Sisson Barrett has spent 51 years on the register since admission in 1975, one of the longest-standing active practitioners the state bar carries at 96% tenure percentile.
- 51 yrs
- in active practice since admission
- Active
- current bar status: "Currently registered"
- Top 4%
- by tenure among active NY attorneys
- Law school
- Harvard
Data updated May 2026
What this profile tells you
Bar status & tenure
William Sisson Barrett has carried New York bar registration 1526953 for the better part of a career, still active and in good standing. Registration is recorded within Judicial Department 1, the appellate division overseeing this attorney's home district.
Practice context & education
The attorney's registration lists a business address in Boston, MA, ZIP 02196. Educational background: HARVARD.
State context & due diligence
Across a career spanning 51 years, William Sisson Barrett has remained part of the New York bar's active cohort, a share of the register detailed further below.
Experience vs. the active New York bar
William Sisson Barrett's 51 years since a 1975 admission places this record near the far edge of the statewide tenure curve below.
51 years on the New York bar
Years since admission, all currently-active NY attorneys
51 Top 4% higher than 96% of 284,296 active NY attorneys
Each bar is a band; taller bars hold more active NY attorneys. The dashed line + filled bar mark this entry. Hover or tap any bar for its full count, share, and where it sits relative to this entry.
Source NY Office of Court Administration, Attorney Registration · May 2026
How William compares to fellow Harvard alumni
Among the 3,070 Harvard graduates in the New York register, William Sisson Barrett is longer-tenured than 99% - a school-cohort view of experience, alongside the statewide one above.
51 years vs. Harvard alumni
Years since admission - 3,070 NY-registered alumni of this school
51 Top 1% higher than 99% of 3,070 fellow alumni
Each bar is a band; taller bars hold more fellow alumni. The dashed line + filled bar mark this entry. Hover or tap any bar for its full count, share, and where it sits relative to this entry.
Source NY Office of Court Administration, Attorney Registration · May 2026
The 1975 admission class today
Of the 3,195 attorneys admitted to the New York bar in 1975, 47.9% are still "Currently registered" today, below the statewide average across all admission years.
Professional Details
- Status
- Currently registered
- Registration Number
- 1526953
- Year Admitted
- 1975 (51 yrs · veteran)
- Judicial Department
- 1
- Next Registration
- Jun 2026
Location & Contact
- City
- Boston, MA
- ZIP Code
- 02196
- Phone
- (617) 782-0936
Education
HARVARD
Status Distribution Across the New York Bar
William Sisson Barrett's current status, "Currently registered", places this attorney in the 66.2% of the 429,620-attorney New York register currently marked active.
Full statewide breakdown & source note
Source: NY Office of Court Administration, Attorney Registrations. Status counts reflect the latest reporting cycle. Bar status confirms registration only; it does not imply competence, specialty fit, or freedom from complaints.
Verify This Attorney
Verify on NY Courts Attorney SearchNearby Attorneys in Boston, MA
Compare credentials side-by-side
Compare William Sisson Barrett with similar attorneys in Boston.
Compare attorneys →Before you rely on this record
William Sisson Barrett's "Currently registered" listing confirms bar standing only, it is a registration fact to verify, not a verdict on quality or competence.
Frequently Asked Questions
Where is William Barrett licensed?
William Barrett is licensed to practice law in New York.
When was William Sisson Barrett admitted to the bar?
William Sisson Barrett's admission to the New York bar dates back to 1975.
Where did William Sisson Barrett go to law school?
William Sisson Barrett attended HARVARD.
Is William Sisson Barrett in good standing?
Yes, William Sisson Barrett holds active bar status ("Currently registered").
Sourced from the NY Office of Court Administration, informational only, not legal advice. Full disclosure.
Read our methodology - how this data is sourced, computed, and verified.