New York attorney record · Judicial Dept 1
William F. Costigan
New York University School Of Law alumna, admitted to the New York bar in 1981, registered office in New York, NY. A half-lifetime's worth of status, address, and registration history on this record come straight from the NY Office of Court Administration.
- 1981
- Admitted
- 45
- Years in bar
- 1725407
- NY reg #
The record in one line
William F. Costigan appears in the New York attorney register with a current status of "Due to reregister within 30 days of birthday", on record since 1981 - an administrative designation rather than discipline, but confirm current standing with the state bar.
- 45 yrs
- since first admission to the bar
- Pending-renewal
- current bar status: "Due to reregister within 30 days of birthday"
- #5688 of 93,608
- by tenure in New York office peers
- Law school
- New York University School Of Law
Data updated September 2026
What this profile tells you
Bar status & tenure
William F. Costigan is registered as bar number 1725407 with the New York bar authority, carrying a current status of "Due to reregister within 30 days of birthday", a routine periodic-renewal reminder, not discipline. Registration is recorded within Judicial Department 1, the appellate division overseeing this attorney's home district.
Practice context & education
Practice address is listed under Costigan Law PLLC, located in New York, NY (New York County), ZIP 10017. Educational background: New York University School of Law (26,345 registered alumni).
State context & due diligence
A "Due to reregister within 30 days of birthday" status falls outside the New York bar's active cohort for now. The breakdown below shows what share of the register that represents.
Tenure among New York, NY office peers
William F. Costigan is earlier in the New York, NY office cohort than most peers: local tenure rank #5,688 of 93,608 (6th percentile). See the New York attorney directory .
- Local rank
- #5,688
- City cohort
- 93,608
- Local percentile
- 6th
- Admitted
- 1981
Nearest tenure peers in New York
- Joseph Paul Abate admitted 1981 · 45 yr
- David S. Abramson admitted 1981 · 45 yr
- Michael S. Adler admitted 1981 · 45 yr
- Benjamin Aerenson admitted 1981 · 45 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.
How William compares to fellow New York University School Of Law alumni
Among the 13,607 New York University School Of Law graduates in the New York register, William F. Costigan is longer-tenured than 99%.
45 years vs. New York University School Of Law alumni
Years since admission - 13,607 NY-registered alumni of this school
45 Top 1% higher than 99% of 13,607 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 · September 2026
New York University School Of Law's active-bar rate
Of New York University School Of Law's 26,345 alumni in the New York register, 64.9% currently hold "Currently registered" status, below the statewide average.
The 1981 admission class today
Of the 4,916 attorneys admitted to the New York bar in 1981, 54.1% are still "Currently registered" today, below the statewide average across all admission years.
Professional Details
- Status
- Due to reregister within 30 days of birthday
- Registration Number
- 1725407
- Year Admitted
- 1981 (45 yrs · veteran)
- Judicial Department
- 1
- Next Registration
- Jul 2026
Location & Contact
- Company
- Costigan Law PLLC
- City
- New York, NY
- County
- New York
- ZIP Code
- 10017
- Phone
- (646) 974-8030
Education
Status Distribution Across the New York Bar
William F. Costigan's current status, "Due to reregister within 30 days of birthday", 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 New York University School Of Law alumni
Fellow alumni on the NY register whose admission year is closest to 1981 (excluding same-firm colleagues above).
Same admission year (1981), other cities
NY-registered attorneys admitted in 1981 whose listed office city differs from New York, a vintage cohort, not a neighborhood list.
Nationwide attorneys with similar admission year or city registry density
Two non-geo peer axes for William F. Costigan: closest NY bar admission year outside NY, and closest out-of-state office cities by how many NY-registered attorneys they list (~93,609 here). Distinct from same-firm, fellow-alumni, and same-year other-city strips above.
Similar admission year (~1981)
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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William F. Costigan is currently listed as "Due to reregister within 30 days of birthday", treat that as a registration fact to confirm, not a verdict on quality.
Frequently Asked Questions
Where is William Costigan licensed?
William Costigan is licensed to practice law in New York.
When was William F. Costigan admitted to the bar?
William F. Costigan's admission to the New York bar dates back to 1981.
Where did William F. Costigan go to law school?
William F. Costigan attended New York University School of Law.
What company does William F. Costigan work for?
William F. Costigan is associated with Costigan Law PLLC in New York, NY.
Is William F. Costigan in good standing?
Not currently, William F. Costigan's listed status is "Due to reregister within 30 days of birthday", not active standing. Confirm current status with the state bar.
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.