Nason/eoir-database

EOIR Immigration Court Database

A clean, queryable DuckDB database built from the EOIR FOIA data dump -- the most comprehensive public dataset on U.S. immigration court proceedings.

169,184,982 rows across 97 tables covering every immigration court case since the 1970s.

Built with eoir-database.

Quick Start

DuckDB CLI

INSTALL httpfs;
LOAD httpfs;
ATTACH 'https://huggingface.co/datasets/Nason/eoir-database/resolve/main/eoir.duckdb' AS eoir (READ_ONLY);

-- Query immediately
SELECT court_name, COUNT(*) as cases
FROM eoir.v_proceedings_full
WHERE CASE_TYPE = 'RMV'
GROUP BY court_name
ORDER BY cases DESC
LIMIT 10;

Python

import duckdb
con = duckdb.connect()
con.sql("INSTALL httpfs; LOAD httpfs;")
con.sql("""
    ATTACH 'https://huggingface.co/datasets/Nason/eoir-database/resolve/main/eoir.duckdb'
    AS eoir (READ_ONLY)
""")
con.sql("SELECT * FROM eoir._metadata").show()

DuckDB uses HTTP range requests, so only the pages needed for your query are downloaded.

Tables

Table	Description	Rows
schedule	Hearing schedule entries with calendar type and adjournments	46,631,388
representatives	Attorney representation records	26,268,999
charges	Individual charges per proceeding	18,867,750
proceedings	Proceedings: hearings, decisions, judges, charges	16,549,948
applications	Applications for relief (asylum, cancellation, etc.)	16,104,798
cases	Case-level demographics, custody, dates, attorney info	12,662,540
custody_history	Custody status change records	10,024,044
motions	Motions filed in proceedings	8,573,390
juvenile_history	Juvenile designation records	2,998,644
lead_rider	Lead/rider case relationships	2,627,442
case_identifiers	Case ID cross-references	2,569,051
bonds	Bond hearing records and amounts	1,616,941
appeals	Appeals to Board of Immigration Appeals	1,518,161
appeal2	Loaded from tblAppeal2.csv	1,237,190
attorneys	Attorney registry	407,493
appeal_fed_courts	Loaded from tblAppealFedCourts.csv	181,484
case_priority_history	Priority code changes	148,995
three_mbr_referrals	Loaded from tblThreeMbrReferrals.csv	84,118
pro_bono	Pro bono screening records	66,986
lu_judge_base_city	Loaded from tblLookupJudgeBaseCity.csv	11,946
lu_insta	Loaded from tblLookupINSTA.csv	9,385
lu_inmate	Loaded from tblLookupInmate.csv	4,848
lu_inmate_housing	Loaded from tblInmateHousing.csv	4,752
lu_responsible_party	Loaded from tblResponsibleParty.csv	3,381
lu_judge	Immigration judge codes	1,676
lu_hearing_location	Hearing location codes	1,351
lu_insloc	Loaded from tblLookupINSLOC.csv	1,020
lu_bia	Loaded from tblLookupBIA.csv	877
lu_insaddress	Loaded from tblLookUpINSAddress.csv	754
lu_language	Language codes	742
lu_holidays	Loaded from tblLookupHolidays.csv	613
lu_notice	Loaded from tblLookupNOTICE.csv	598
lu_district_location	Loaded from tblLookupDistrictLocation.csv	288
lu_office_location	Loaded from tblLookupOfficeLocation.csv	264
lu_alien_nat	Loaded from tblLookupAlienNat.csv	256
lu_country	Loaded from tblLookupCountry.csv	254
lu_charges	Charge codes and descriptions	252
lu_nationality	Nationality/country codes	251
lu_appeal_issues	Loaded from tblLookupAppealIssues.csv	247
lu_biacluster	Loaded from tblLookup_BIACluster.csv	243
lu_court_decision	Court decision codes (by case type)	217
lu_bar_code_type	Loaded from tblBarCodeType.csv	141
lu_adjournment	Adjournment reason codes	124
lu_case_identifier	Loaded from tblLookUpCaseIdentifier.csv	111
lu_base_city	Immigration court locations	97
lu_in_tr_pr	Loaded from tblLookupInTrPr.csv	94
lu_motion_type	Motion type codes	72
lu_insoffice	Loaded from tblINSoffice.csv	72
lu_state	U.S. state codes	59
lu_bia_decision	BIA decision codes	54
lu_special_issue	Loaded from tblLookupSpecialIssue.csv	43
lu_application	Application type codes	40
lu_teams	Loaded from tblTeams.csv	37
lu_hold_reason	Loaded from tblLookupHoldReason.csv	37
lu_schedule_type	Schedule type codes	36
lu_callup_reasons	Loaded from tblLookupCallup_Reasons.csv	30
lu_cal_type	Calendar type codes	29
lu_dddecision_types	Loaded from tblLookUpDDDecisionTypes.csv	23
lu_panels	Loaded from tblPanels.csv	20
lu_appeal_type	Loaded from tbllookupAppealType.csv	19
lu_priority	Loaded from tblLookupPriority.csv	16
lu_board_motions	Loaded from tblLookupBoardMotions.csv	16
lu_br_deduct_codes	Loaded from tbl_br_DeductCodes.csv	15
lu_app_decision	Application decision codes	14
lu_intr_pr_lang	Loaded from tblLookupIntrPrLang.csv	14
lu_transcribers	Loaded from tblLookupTranscribers.csv	14
lu_case_type	Case type codes	13
lu_dec_code	Loaded from tblDecCode.csv	12
lu_filing_method_party	Loaded from tblLookupFiling_Method_Party.csv	10
lu_filed_by	Loaded from tblLookupFiledBy.csv	9
lu_comment_type_board	Loaded from tblLookupCommentTypeBoard.csv	9
lu_contact_change	Loaded from tblLookupContactChange.csv	9
lu_torture_conv_id	Loaded from tblTortureConvID.csv	8
lu_ins_clock_entry_status	Loaded from tblLookup_INS_Clock_Entry_Status.csv	8
lu_3_mbr_referred_reason	Loaded from tblLookup3MbrReferredReason.csv	7
lu_category	Loaded from tbllookup_Category.csv	7
lu_vote	Loaded from tblLookupVote.csv	7
lu_juvenile	Loaded from tblLookup_Juvenile.csv	6
lu_service_method	Loaded from tblLookupService_Method.csv	6
lu_case_priority	Loaded from tblLookup_CasePriority.csv	6
lu_fee_status	Loaded from tblLookupFeeStatus.csv	5
lu_consulted_with	Loaded from tblLookupConsultedWith.csv	5
lu_biadecision_type	Loaded from tblLookupBIADecisionType.csv	5
lu_in_tr_pr_agenda	Loaded from tblLookupInTrPrAgenda.csv	5
lu_fed_court_decision	Loaded from tblLookupFedCourtDecision.csv	4
lu_oaresponse	Loaded from tblLookupOAResponse.csv	4
lu_components	Loaded from tblLookupComponents.csv	4
lu_filing_method	Loaded from tblLookupFiling_Method.csv	4
lu_final_disposition	Loaded from tblLookupFinalDisposition.csv	4
lu_claimed_issue	Loaded from tblLookupClaimedIssue.csv	4
lu_custody_status	Custody status codes	3
lu_fee_type	Loaded from tblLookupFeeType.csv	3
lu_allegation_stmt	Loaded from tblLookUpAllegationStmt.csv	3
lu_region	Loaded from tblLookupRegion.csv	2
lu_sex	Loaded from tblLookupSex.csv	2
lu_in_tr_pr_lang_group	Loaded from tblLookupInTrPrLangGroup.csv	2
lu_fed_court_remand_to	Loaded from tblLookupFedCourtRemandTo.csv	2

Data Source

EOIR FOIA Library -- updated monthly by the Executive Office for Immigration Review (U.S. Department of Justice). This is public domain U.S. government data.

License

Database build code: MIT. Underlying data: public domain (U.S. government work).

GitHub

Full source code, build instructions, and example analyses: github.com/ian-nason/eoir-database

Changelog

2026-07-06 — Full refresh + data-quality audit

Rebuilt from the latest DOJ EOIR FOIA release (proceedings through 2026) and repaired after an independent SQL-verified audit.

Data changes

• 169,184,982 rows across 97 tables (data through 2026; 248k proceedings filed in 2026).
• All VARCHAR values normalized: trailing-space padding trimmed, literal NUL bytes stripped, blank strings converted to NULL (214 columns affected).

Fixes

• Charge-code lookup joins went from 76.97% to 100.00% coverage — the gap was whitespace padding in the source export, not missing lookup codes as previously documented.
• Language lookups no longer silently drop 1.7M trailing-space 'SP ' (Spanish) rows.
• README quickstart query corrected (filing dates live on proceedings, not cases).

Known caveats (see README for the full list)

• cases.C_BIRTHDATE is 100% NULL (redacted at source) — no age analyses.
• ~45% of proceedings have no usable decision code once blanks are counted.
• Proceedings (16.5M) vs cases (12.7M): counting proceedings overcounts people ~1.3x. Cap dates to 1950-2035 before computing durations.