Immigration Judge at Boston, MA
Judge Maureen O'Sullivan serves at the Boston, MA Immigration Court. 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).
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 Other procedural outcomes, including terminated, withdrawn, administratively closed, or removed cases, are tracked separately where available and are not treated as asylum grants.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 2026-07-01. It is for research and information only, not legal advice.
Read the grant-rate methodology or learn how to read immigration judge statistics.
| Nationality | 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% |
| 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% |
Judge Maureen O'Sullivan's asylum approval rate is 65.5% according to EOIR FOIA data.
The dataset lists 5,999 total asylum cases for Judge Maureen O'Sullivan.
The approval rate is calculated as granted divided by (granted + denied). It excludes terminations and withdrawals, and the source is EOIR FOIA data.