New York attorney record · Judicial Dept 4
Peter O'Brian Dellinger
Antioch School Of Law alumna, admitted to the New York bar in 1983, registered office in Rochester, NY. A half-lifetime's worth of status, address, and registration history on this record come straight from the NY Office of Court Administration.
- 1983
- Admitted
- 43
- Years in bar
- 1880285
- NY reg #
The record in one line
Peter O'Brian Dellinger has spent 43 years on the register since admission in 1983, one of the longest-standing active practitioners the state bar carries at 86% tenure percentile.
- 43 yrs
- in active practice since admission
- Active
- current bar status: "Currently registered"
- #331 of 2,355
- by tenure in Rochester office peers
- Law school
- Antioch School Of Law
Data updated August 2026
What this profile tells you
Bar status & tenure
Peter O'Brian Dellinger has carried New York bar registration 1880285 for the better part of a career, still active and in good standing. Registration is recorded within Judicial Department 4, the appellate division overseeing this attorney's home district.
Practice context & education
The attorney's registration lists a business address in Rochester, NY (Monroe County), ZIP 14618. Educational background: ANTIOCH SCHOOL OF LAW (76 registered alumni).
State context & due diligence
Across a career spanning 43 years, Peter O'Brian Dellinger 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
Peter O'Brian Dellinger's 43 years since a 1983 admission places this record near the far edge of the statewide tenure curve below.
43 years on the New York bar
Years since admission, all currently-active NY attorneys
43 Top 14% higher than 86% of 290,787 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 · August 2026
Tenure among Rochester, NY office peers
Peter O'Brian Dellinger is earlier in the Rochester, NY office cohort than most peers: local tenure rank #331 of 2,355 (14th percentile). See the Rochester attorney directory .
- Local rank
- #331
- City cohort
- 2,355
- Local percentile
- 14th
- Admitted
- 1983
Nearest tenure peers in Rochester
- Ted A. Barraco admitted 1983 · 43 yr
- Karen Smith Callanan admitted 1983 · 43 yr
- William George Clauss admitted 1983 · 43 yr
- Robert Lee Cook admitted 1983 · 43 yr
How local rank is computed
Rank uses years since NY-bar admission among non-deceased registry rows that list the same office city and state, a local placement, not a statewide claim. Source: NY Office of Court Administration Attorney Registration · as of August 2026. Derived local rank, not published upstream.
How Peter compares to fellow Antioch School Of Law alumni
Among the 65 Antioch School Of Law graduates in the New York register, Peter O'Brian Dellinger is longer-tenured than 28%.
43 years vs. Antioch School Of Law alumni
Years since admission - 65 NY-registered alumni of this school
43 Top 72% higher than 28% of 65 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 · August 2026
Antioch School Of Law's active-bar rate
Of Antioch School Of Law's 76 alumni in the New York register, 61.8% currently hold "Currently registered" status, below the statewide average.
The 1983 admission class today
Of the 5,424 attorneys admitted to the New York bar in 1983, 67.4% are still "Currently registered" today, above the statewide average across all admission years.
Professional Details
- Status
- Currently registered
- Registration Number
- 1880285
- Year Admitted
- 1983 (43 yrs · veteran)
- Judicial Department
- 4
- Next Registration
- Feb 2027
Location & Contact
- City
- Rochester, NY
- County
- Monroe
- ZIP Code
- 14618
- Phone
- (585) 224-5200
Education
Status Distribution Across the New York Bar
Peter O'Brian Dellinger's current status, "Currently registered", places this attorney in the 67.2% of the 432,625-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.
Near-tenure Antioch School Of Law alumni
Fellow alumni on the NY register whose admission year is closest to 1983 .
Same admission year (1983), other cities
NY-registered attorneys admitted in 1983 whose listed office city differs from Rochester, a vintage cohort, not a neighborhood list.
Nationwide attorneys with similar admission year or city registry density
Two non-geo peer axes for Peter O'Brian Dellinger: closest NY bar admission year outside NY, and closest out-of-state office cities by how many NY-registered attorneys they list (~2,356 here). Distinct from same-firm, fellow-alumni, and same-year other-city strips above.
Similar admission year (~1983)
Counts come from the NY State Office of Court Administration registration extract; peers are not a competence or practice-area ranking.
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Compare attorneys →Before you rely on this record
Peter O'Brian Dellinger'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 Peter Dellinger licensed?
Peter Dellinger is licensed to practice law in New York.
When was Peter O'Brian Dellinger admitted to the bar?
Peter O'Brian Dellinger's admission to the New York bar dates back to 1983.
Where did Peter O'Brian Dellinger go to law school?
Peter O'Brian Dellinger attended ANTIOCH SCHOOL OF LAW.
Is Peter O'Brian Dellinger in good standing?
Yes, Peter O'Brian Dellinger holds active bar status ("Currently registered").
Cite this page & disclosure
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.