Immigration judge
Judge Maureen O'Sullivan
Immigration Judge at Boston, MA
EOIR data through Sep 1, 2026 · updated monthly
- 3,928
- Granted
- 2,071
- Denied
- 5,999
- Total Decided
The 2026-09-01 snapshot lists a 65.5% historical asylum grant rate for Maureen O'Sullivan at Boston, MA, based on 3,928 grants and 2,071 denials (5,999 decided outcomes).
The 2026-09-01 EOIR snapshot lists Maureen O'Sullivan with Boston, MA. With an asylum approval rate of 65.5%, this judge is above average compared to the national average. Data sourced from EOIR (Executive Office for Immigration Review). Historical listings do not by themselves establish a current assignment.
How to Interpret These Judge Statistics
Maureen O'Sullivan is listed with the Boston, MA Immigration Court. The headline asylum grant rate shown here is 65.5% based on granted and denied asylum decisions represented in the current dataset.
Among the largest nationality groups shown for this judge, the table highlights Guatemala (678 decided, 84.2% grant rate), El Salvador (498 decided, 90.0% grant rate), and Brazil (380 decided, 43.7% grant rate). Compare these rows with the judge's overall rate because nationality mix can materially change how the headline number should be read.
Grant rate is calculated as granted / (granted + denied). Other procedural outcomes, including terminated, withdrawn, administratively closed, or removed cases, are tracked separately where available and are not treated as asylum grants.
This page is based on public EOIR data last updated 2026-09-01. It is for research and information only, not legal advice.
Read the grant-rate methodology or learn how to read immigration judge statistics.
Nationality Breakdown
| Nationality | Cases | Grant rate |
|---|---|---|
| Guatemala | 678 | 84.2% |
| El Salvador | 498 | 90.0% |
| Brazil | 380 | 43.7% |
| Honduras | 239 | 77.4% |
| Ecuador | 104 | 83.7% |
| Dominican Republic | 64 | 62.5% |
| Mexico | 58 | 82.8% |
| Haiti | 47 | 66.0% |
Yearly Trends
| Year | Cases | Grant rate |
|---|---|---|
| 2025 | 305 | 81.3% |
| 2024 | 531 | 94.0% |
| 2023 | 454 | 74.4% |
| 2022 | 573 | 75.2% |
| 2021 | 363 | 73.3% |
| 2020 | 427 | 65.8% |
Frequently Asked Questions
What is Judge Maureen O'Sullivan's asylum grant rate?
Judge Maureen O'Sullivan granted asylum in 65.5% of 5,999 decided cases (grants plus denials), according to EOIR data.
Does Judge Maureen O'Sullivan grant asylum more or less often than other judges?
The rate (65.5%) is above the 16.6% national rate; the median judge at Boston, MA grants 24.5%. It is a historical average, not a prediction for any one case.
How is this grant rate calculated?
Grants divided by grants plus denials. Terminations, withdrawals and administrative closures are not counted.