New York attorney record · Judicial Dept 3
Dennis Joseph Callahan Iii
William & Mary Law School alumna, admitted to the New York bar in 2004, registered office in San Francisco, CA. This established record's status, address, and registration history come straight from the NY Office of Court Administration.
- 2004
- Admitted
- 22
- Years in bar
- 4218418
- NY reg #
The record in one line
Dennis Joseph Callahan Iii has held an active New York bar license for 22 years - admitted in 2004, longer-tenured than 51% of the state's currently-active attorneys.
- 22 yrs
- in active practice since admission
- Active
- current bar status: "Currently registered"
- Top 49%
- by tenure among active NY attorneys
- Law school
- William & Mary Law School
Data updated May 2026
What this profile tells you
Bar status & tenure
Dennis Joseph Callahan Iii carries New York bar registration 4218418, an established, active practitioner in good standing. Registration is recorded within Judicial Department 3, the appellate division overseeing this attorney's home district.
Practice context & education
Practice address is listed under Rogers Joseph O'Donnell, P.C., located in San Francisco, CA, ZIP 94104. Educational background: William & Mary Law School (526 registered alumni).
State context & due diligence
With an established practice on record, Dennis Joseph Callahan Iii remains inside the New York bar's active cohort - see below for how that share of the register compares.
Experience vs. the active New York bar
Dennis Joseph Callahan Iii was admitted in 2004, giving 22 years on the New York register. The histogram places that tenure against every currently-active attorney in the state, taller bars hold more attorneys at that experience level.
22 years on the New York bar
Years since admission, all currently-active NY attorneys
22 Top 49% higher than 51% 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 Dennis compares to fellow William & Mary Law School alumni
Among the 483 William & Mary Law School graduates in the New York register, Dennis Joseph Callahan Iii is longer-tenured than 91% - a school-cohort view of experience, alongside the statewide one above.
22 years vs. William & Mary Law School alumni
Years since admission - 483 NY-registered alumni of this school
22 Top 9% higher than 91% of 483 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
William & Mary Law School's active-bar rate
Of William & Mary Law School's 526 alumni in the New York register, 83.5% currently hold "Currently registered" status, above the statewide average.
William & Mary Law School alumni, active-bar rate
The 2004 admission class today
Of the 8,407 attorneys admitted to the New York bar in 2004, 65.8% are still "Currently registered" today, below the statewide average across all admission years.
Professional Details
- Status
- Currently registered
- Registration Number
- 4218418
- Year Admitted
- 2004 (22 yrs · senior)
- Judicial Department
- 3
- Next Registration
- Oct 2026
Location & Contact
- Company
- Rogers Joseph O'Donnell, P.C.
- City
- San Francisco, CA
- ZIP Code
- 94104
- Phone
- (415) 365-5385
Education
Status Distribution Across the New York Bar
Dennis Joseph Callahan Iii'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.
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Compare attorneys →Before you rely on this record
Dennis Joseph Callahan Iii'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 Dennis Callahan licensed?
Dennis Callahan is licensed to practice law in New York.
When was Dennis Joseph Callahan Iii admitted to the bar?
Dennis Joseph Callahan Iii was admitted to the bar in 2004.
Where did Dennis Joseph Callahan Iii go to law school?
Dennis Joseph Callahan Iii attended William & Mary Law School.
What company does Dennis Joseph Callahan Iii work for?
Dennis Joseph Callahan Iii is associated with Rogers Joseph O'Donnell, P.C. in San Francisco, CA.
Is Dennis Joseph Callahan Iii in good standing?
Yes, Dennis Joseph Callahan Iii 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.