New York attorney record · Judicial Dept 2
Mark E. Costello
St Johns University alumna, admitted to the New York bar in 1984, registered office in Jericho, NY. A half-lifetime's worth of status, address, and registration history on this record come straight from the NY Office of Court Administration.
- 1984
- Admitted
- 42
- Years in bar
- 1928936
- NY reg #
The record in one line
Mark E. Costello has spent 42 years on the register since admission in 1984, one of the longest-standing active practitioners the state bar carries at 86% tenure percentile.
- 42 yrs
- in active practice since admission
- Active
- current bar status: "Currently registered"
- #81 of 486
- by tenure in Jericho office peers
- Law school
- St Johns University
Data updated August 2026
What this profile tells you
Bar status & tenure
Mark E. Costello has carried New York bar registration 1928936 for the better part of a career, still active and in good standing. Registration is recorded within Judicial Department 2, the appellate division overseeing this attorney's home district.
Practice context & education
Practice address is listed under Kimco Realty Corporation, located in Jericho, NY (Nassau County), ZIP 11753. 5 other attorneys share this firm affiliation in the registry. Educational background: ST JOHNS UNIVERSITY.
State context & due diligence
Across a career spanning 42 years, Mark E. Costello 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
Mark E. Costello's 42 years since a 1984 admission places this record near the far edge of the statewide tenure curve below.
42 years on the New York bar
Years since admission, all currently-active NY attorneys
42 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 Jericho, NY office peers
Most of the 486 NY-registered attorneys in Jericho, NY outrank Mark E. Costello on tenure; this record sits at the 16th local percentile (rank #81). See the Jericho attorney directory .
- Local rank
- #81
- City cohort
- 486
- Local percentile
- 16th
- Admitted
- 1984
Nearest tenure peers in Jericho
- Michaelle Josette Apollon admitted 1984 · 42 yr
- Francis A. Bolz Iii admitted 1984 · 42 yr
- Glenn David Brettschneider admitted 1984 · 42 yr
- Barbara Ellen Briamonte admitted 1984 · 42 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 Mark compares to fellow St Johns University alumni
Among the 3,147 St Johns University graduates in the New York register, Mark E. Costello is longer-tenured than 58%.
42 years vs. St Johns University alumni
Years since admission - 3,147 NY-registered alumni of this school
42 Top 42% higher than 58% of 3,147 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
The 1984 admission class today
Of the 5,952 attorneys admitted to the New York bar in 1984, 54.8% are still "Currently registered" today, below the statewide average across all admission years.
Professional Details
- Status
- Currently registered
- Registration Number
- 1928936
- Year Admitted
- 1984 (42 yrs · veteran)
- Judicial Department
- 2
- Next Registration
- Apr 2028
Location & Contact
- Company
- Kimco Realty Corporation
- City
- Jericho, NY
- County
- Nassau
- ZIP Code
- 11753
- Phone
- (516) 869-2667
Education
ST JOHNS UNIVERSITY
Status Distribution Across the New York Bar
Mark E. Costello'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.
Same firm affiliation: Kimco Realty Corporation
Other NY-registered attorneys who share this firm name on the OCA register (not a geographic peer set).
Near-tenure St Johns University alumni
Fellow alumni on the NY register whose admission year is closest to 1984 (excluding same-firm colleagues above).
Same admission year (1984), other cities
NY-registered attorneys admitted in 1984 whose listed office city differs from Jericho, a vintage cohort, not a neighborhood list.
Nationwide attorneys with similar admission year or city registry density
Two non-geo peer axes for Mark E. Costello: closest NY bar admission year outside NY, and closest out-of-state office cities by how many NY-registered attorneys they list (~487 here). Distinct from same-firm, fellow-alumni, and same-year other-city strips above.
Similar admission year (~1984)
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 Jericho, NY
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Compare attorneys →Before you rely on this record
Mark E. Costello'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 Mark Costello licensed?
Mark Costello is licensed to practice law in New York.
When was Mark E. Costello admitted to the bar?
Mark E. Costello's admission to the New York bar dates back to 1984.
Where did Mark E. Costello go to law school?
Mark E. Costello attended ST JOHNS UNIVERSITY.
What company does Mark E. Costello work for?
Mark E. Costello is associated with Kimco Realty Corporation in Jericho, NY.
Is Mark E. Costello in good standing?
Yes, Mark E. Costello 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.