New York attorney record · Judicial Dept 4
Mark J. O'Connor
Suny Ab alumna, admitted to the New York bar in 1973, registered office in Williamsville, NY. A half-lifetime's worth of status, address, and registration history on this record come straight from the NY Office of Court Administration.
- 1973
- Admitted
- 53
- Years in bar
- 2644425
- NY reg #
The record in one line
Mark J. O'Connor carries a "Suspended, delinquent" status on the New York bar register, on record since 1973 - confirm the exact standing and any discipline history directly with the state bar before engaging.
- 53 yrs
- since first admission to the bar
- Suspended
- current bar status: "Suspended, delinquent"
- #30 of 456
- by tenure in Williamsville office peers
- Law school
- Suny Ab
Data updated September 2026
What this profile tells you
Bar status & tenure
Mark J. O'Connor is registered as bar number 2644425 with the New York bar authority, carrying a current status of "Suspended, delinquent", suspended or delinquent, verify terms with the bar before engaging. 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 Williamsville, NY (Erie County), ZIP 14221. Educational background: SUNY AB.
State context & due diligence
A "Suspended, delinquent" status falls outside the New York bar's active cohort. The breakdown below shows what share of the register that represents, and how to verify current standing directly with the state bar.
Tenure among Williamsville, NY office peers
Most of the 456 NY-registered attorneys in Williamsville, NY outrank Mark J. O'Connor on tenure; this record sits at the 6th local percentile (rank #30). See the Williamsville attorney directory .
- Local rank
- #30
- City cohort
- 456
- Local percentile
- 6th
- Admitted
- 1973
Nearest tenure peers in Williamsville
- John Gene Brenon admitted 1973 · 53 yr
- Charles Peter Infantino admitted 1973 · 53 yr
- James Edward Kelly Iii admitted 1973 · 53 yr
- William J. Regan admitted 1973 · 53 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 September 2026. Derived local rank, not published upstream.
The 1973 admission class today
Of the 2,460 attorneys admitted to the New York bar in 1973, 42% are still "Currently registered" today, below the statewide average across all admission years.
Professional Details
- Status
- Suspended, delinquent
- Registration Number
- 2644425
- Year Admitted
- 1973 (53 yrs · veteran)
- Judicial Department
- 4
- Next Registration
- Sep 2026
Location & Contact
- City
- Williamsville, NY
- County
- Erie
- ZIP Code
- 14221
- Phone
- (716) 634-8798
Education
SUNY AB
Status Distribution Across the New York Bar
Mark J. O'Connor's current status, "Suspended, delinquent", places this record outside 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 Suny Ab alumni
Fellow alumni on the NY register whose admission year is closest to 1973 .
Same admission year (1973), other cities
NY-registered attorneys admitted in 1973 whose listed office city differs from Williamsville, a vintage cohort, not a neighborhood list.
Nationwide attorneys with similar admission year or city registry density
Two non-geo peer axes for Mark J. O'Connor: closest NY bar admission year outside NY, and closest out-of-state office cities by how many NY-registered attorneys they list (~457 here). Distinct from same-firm, fellow-alumni, and same-year other-city strips above.
Similar admission year (~1973)
Counts come from the NY State Office of Court Administration registration extract; peers are not a competence or practice-area ranking.
Verify This Attorney
Verify on NY Courts Attorney SearchNearby Attorneys in Williamsville, NY
Compare credentials side-by-side
Compare Mark J. O'Connor with similar attorneys in Williamsville.
Compare attorneys →Before you rely on this record
Mark J. O'Connor carries a "Suspended, delinquent" status. Verify the exact scope and dates of this action directly with the state bar before acting on it.
Frequently Asked Questions
Where is Mark O'Connor licensed?
Mark O'Connor is licensed to practice law in New York.
When was Mark J. O'Connor admitted to the bar?
Mark J. O'Connor's admission to the New York bar dates back to 1973.
Where did Mark J. O'Connor go to law school?
Mark J. O'Connor attended SUNY AB.
Is Mark J. O'Connor in good standing?
No, Mark J. O'Connor carries a "Suspended, delinquent" status, not active standing. Confirm the exact scope directly with the state bar before engaging.
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.