Open US Law

Structured US primary law: statutes, regulations, constitutions, court rules and agency guidance. Snapshot v2026.09.1, 2026-09-30. 308 Parquet files, one 24-column schema. Data CC BY-NC 4.0 (non-commercial); the underlying law is public domain; scrapers Apache-2.0.

Canonical dataset (with in-browser preview): https://huggingface.co/datasets/vaquill/open-us-law
Scrapers (Apache-2.0): https://github.com/Vaquill-AI/open-us-law
Everything in one file: open-us-law-v2026.09.1-parquet.tar (~6906 MB)
Machine manifest: index.json · SHA256SUMS.json

The law itself is public domain (Georgia v. Public.Resource.Org, 2020). New snapshots quarterly.

State and territorial statutes + US Code

Jur.	File	Size
FEDERAL	us_federal_statutes.parquet	80.8 MB
CA	us_ca_statutes.parquet	60.7 MB
IL	us_il_statutes.parquet	31.4 MB
TX	us_tx_statutes.parquet	31.2 MB
NY	us_ny_statutes.parquet	31.0 MB
NJ	us_nj_statutes.parquet	24.9 MB
IN	us_in_statutes.parquet	23.2 MB
WA	us_wa_statutes.parquet	22.8 MB
LA	us_la_statutes.parquet	22.4 MB
FL	us_fl_statutes.parquet	21.3 MB
MI	us_mi_statutes.parquet	21.0 MB
MN	us_mn_statutes.parquet	20.6 MB
OR	us_or_statutes.parquet	20.4 MB
OH	us_oh_statutes.parquet	20.1 MB
AL	us_al_statutes.parquet	19.4 MB
OK	us_ok_statutes.parquet	18.3 MB
VA	us_va_statutes.parquet	17.3 MB
NV	us_nv_statutes.parquet	16.7 MB
MD	us_md_statutes.parquet	16.3 MB
MO	us_mo_statutes.parquet	16.2 MB
NC	us_nc_statutes.parquet	16.1 MB
UT	us_ut_statutes.parquet	15.3 MB
ME	us_me_statutes.parquet	15.2 MB
WV	us_wv_statutes.parquet	14.4 MB
AZ	us_az_statutes.parquet	14.2 MB
MA	us_ma_statutes.parquet	13.8 MB
SC	us_sc_statutes.parquet	13.4 MB
KY	us_ky_statutes.parquet	13.1 MB
NE	us_ne_statutes.parquet	13.1 MB
MT	us_mt_statutes.parquet	13.0 MB
IA	us_ia_statutes.parquet	12.9 MB
WI	us_wi_statutes.parquet	12.5 MB
KS	us_ks_statutes.parquet	12.4 MB
ID	us_id_statutes.parquet	11.8 MB
CT	us_ct_statutes.parquet	11.8 MB
NM	us_nm_statutes.parquet	11.4 MB
ND	us_nd_statutes.parquet	11.2 MB
DE	us_de_statutes.parquet	11.1 MB
SD	us_sd_statutes.parquet	11.0 MB
PR	us_pr_statutes.parquet	10.8 MB
VT	us_vt_statutes.parquet	10.7 MB
NH	us_nh_statutes.parquet	10.6 MB
DC	us_dc_statutes.parquet	10.4 MB
HI	us_hi_statutes.parquet	9.2 MB
RI	us_ri_statutes.parquet	8.6 MB
PA	us_pa_statutes.parquet	7.9 MB
WY	us_wy_statutes.parquet	7.8 MB
AK	us_ak_statutes.parquet	7.2 MB

Regulations

Jur.	File	Size
FEDERAL	us_federal_regulations.parquet	1449.4 MB
PR	us_pr_regulations.parquet	89.2 MB
IL	us_il_regulations.parquet	40.5 MB
WA	us_wa_regulations.parquet	32.2 MB
OR	us_or_regulations.parquet	28.1 MB
WV	us_wv_regulations.parquet	27.6 MB
CO	us_co_regulations.parquet	24.1 MB
MS	us_ms_regulations.parquet	22.2 MB
OH	us_oh_regulations.parquet	21.7 MB
OK	us_ok_regulations.parquet	19.3 MB
FL	us_fl_regulations.parquet	19.2 MB
PA	us_pa_regulations.parquet	18.3 MB
DC	us_dc_regulations.parquet	17.3 MB
NH	us_nh_regulations.parquet	15.3 MB
VA	us_va_regulations.parquet	14.8 MB
NM	us_nm_regulations.parquet	14.6 MB
MT	us_mt_regulations.parquet	14.4 MB
AR	us_ar_regulations.parquet	13.4 MB
CT	us_ct_regulations.parquet	13.3 MB
IA	us_ia_regulations.parquet	12.6 MB
AL	us_al_regulations.parquet	12.5 MB
NC	us_nc_regulations.parquet	12.3 MB
GA	us_ga_regulations.parquet	11.8 MB
WI	us_wi_regulations.parquet	11.7 MB
UT	us_ut_regulations.parquet	10.8 MB
MN	us_mn_regulations.parquet	10.1 MB
ME	us_me_regulations.parquet	9.8 MB
KY	us_ky_regulations.parquet	9.6 MB
AK	us_ak_regulations.parquet	9.6 MB
NV	us_nv_regulations.parquet	9.5 MB
MD	us_md_regulations.parquet	9.4 MB
NE	us_ne_regulations.parquet	9.1 MB
DE	us_de_regulations.parquet	8.9 MB
MI	us_mi_regulations.parquet	8.4 MB
WY	us_wy_regulations.parquet	7.3 MB
SD	us_sd_regulations.parquet	7.2 MB
ND	us_nd_regulations.parquet	6.5 MB
KS	us_ks_regulations.parquet	6.4 MB
SC	us_sc_regulations.parquet	5.2 MB
ID	us_id_regulations.parquet	4.6 MB

Court rules

Jur.	File	Size
FEDERAL	us_federal_court_rules.parquet	2.2 MB
PA	us_pa_court_rules.parquet	1.9 MB
NM	us_nm_court_rules.parquet	1.8 MB
MA	us_ma_court_rules.parquet	1.6 MB
AL	us_al_court_rules.parquet	1.5 MB
FL	us_fl_court_rules.parquet	1.3 MB
OH	us_oh_court_rules.parquet	1.2 MB
CA	us_ca_court_rules.parquet	1.2 MB
NJ	us_nj_court_rules.parquet	1.2 MB
DE	us_de_court_rules.parquet	1.1 MB
ND	us_nd_court_rules.parquet	1.1 MB
WA	us_wa_court_rules.parquet	1.1 MB
MI	us_mi_court_rules.parquet	1.0 MB
DC	us_dc_court_rules.parquet	1.0 MB
UT	us_ut_court_rules.parquet	1.0 MB
AK	us_ak_court_rules.parquet	1.0 MB
NV	us_nv_court_rules.parquet	1.0 MB
CT	us_ct_court_rules.parquet	1.0 MB
TN	us_tn_court_rules.parquet	1.0 MB
HI	us_hi_court_rules.parquet	0.9 MB
MN	us_mn_court_rules.parquet	0.9 MB
CO	us_co_court_rules.parquet	0.8 MB
IN	us_in_court_rules.parquet	0.8 MB
PR	us_pr_court_rules.parquet	0.8 MB
IL	us_il_court_rules.parquet	0.8 MB
MS	us_ms_court_rules.parquet	0.8 MB
IA	us_ia_court_rules.parquet	0.7 MB
NH	us_nh_court_rules.parquet	0.7 MB
ME	us_me_court_rules.parquet	0.7 MB
RI	us_ri_court_rules.parquet	0.7 MB
WY	us_wy_court_rules.parquet	0.7 MB
TX	us_tx_court_rules.parquet	0.7 MB
SC	us_sc_court_rules.parquet	0.6 MB
NY	us_ny_court_rules.parquet	0.6 MB
WV	us_wv_court_rules.parquet	0.6 MB
ID	us_id_court_rules.parquet	0.6 MB
AR	us_ar_court_rules.parquet	0.6 MB
NE	us_ne_court_rules.parquet	0.6 MB
GA	us_ga_court_rules.parquet	0.6 MB
OR	us_or_court_rules.parquet	0.6 MB
NC	us_nc_court_rules.parquet	0.4 MB
KS	us_ks_court_rules.parquet	0.4 MB
LA	us_la_court_rules.parquet	0.4 MB
WI	us_wi_court_rules.parquet	0.4 MB
VA	us_va_court_rules.parquet	0.3 MB
MT	us_mt_court_rules.parquet	0.2 MB
SD	us_sd_court_rules.parquet	0.1 MB

Agency guidance

Jur.	File	Size
FEDERAL	us_federal_guidance.parquet	125.1 MB
PR	us_pr_guidance.parquet	2.3 MB
NY	us_ny_guidance.parquet	2.2 MB
TX	us_tx_guidance.parquet	1.6 MB
MD	us_md_guidance.parquet	1.3 MB
MA	us_ma_guidance.parquet	0.9 MB
NJ	us_nj_guidance.parquet	0.9 MB
CA	us_ca_guidance.parquet	0.9 MB
AZ	us_az_guidance.parquet	0.8 MB
SC	us_sc_guidance.parquet	0.7 MB
CT	us_ct_guidance.parquet	0.6 MB
KY	us_ky_guidance.parquet	0.6 MB
WV	us_wv_guidance.parquet	0.6 MB
AR	us_ar_guidance.parquet	0.6 MB
AK	us_ak_guidance.parquet	0.6 MB
DE	us_de_guidance.parquet	0.4 MB
NH	us_nh_guidance.parquet	0.4 MB
VT	us_vt_guidance.parquet	0.4 MB
WI	us_wi_guidance.parquet	0.4 MB
ME	us_me_guidance.parquet	0.4 MB
NM	us_nm_guidance.parquet	0.4 MB
MS	us_ms_guidance.parquet	0.4 MB
MT	us_mt_guidance.parquet	0.3 MB
ND	us_nd_guidance.parquet	0.3 MB
IN	us_in_guidance.parquet	0.3 MB
IL	us_il_guidance.parquet	0.3 MB
NV	us_nv_guidance.parquet	0.3 MB
MI	us_mi_guidance.parquet	0.3 MB
UT	us_ut_guidance.parquet	0.3 MB
AL	us_al_guidance.parquet	0.3 MB
TN	us_tn_guidance.parquet	0.3 MB
HI	us_hi_guidance.parquet	0.3 MB
OR	us_or_guidance.parquet	0.3 MB
RI	us_ri_guidance.parquet	0.2 MB
OK	us_ok_guidance.parquet	0.2 MB
NE	us_ne_guidance.parquet	0.2 MB
VA	us_va_guidance.parquet	0.2 MB
IA	us_ia_guidance.parquet	0.2 MB
OH	us_oh_guidance.parquet	0.2 MB
MO	us_mo_guidance.parquet	0.1 MB
FL	us_fl_guidance.parquet	0.1 MB
KS	us_ks_guidance.parquet	0.1 MB
WY	us_wy_guidance.parquet	0.1 MB
ID	us_id_guidance.parquet	0.1 MB
NC	us_nc_guidance.parquet	0.1 MB
MN	us_mn_guidance.parquet	0.1 MB
WA	us_wa_guidance.parquet	0.1 MB
GA	us_ga_guidance.parquet	0.1 MB
DC	us_dc_guidance.parquet	0.1 MB
SD	us_sd_guidance.parquet	0.0 MB

Constitutions

Jur.	File	Size
TX	us_tx_constitutions.parquet	0.2 MB
MO	us_mo_constitutions.parquet	0.2 MB
AL	us_al_constitutions.parquet	0.2 MB
CA	us_ca_constitutions.parquet	0.2 MB
OK	us_ok_constitutions.parquet	0.2 MB
LA	us_la_constitutions.parquet	0.1 MB
AR	us_ar_constitutions.parquet	0.1 MB
OR	us_or_constitutions.parquet	0.1 MB
OH	us_oh_constitutions.parquet	0.1 MB
FL	us_fl_constitutions.parquet	0.1 MB
AZ	us_az_constitutions.parquet	0.1 MB
NY	us_ny_constitutions.parquet	0.1 MB
GA	us_ga_constitutions.parquet	0.1 MB
WA	us_wa_constitutions.parquet	0.1 MB
MD	us_md_constitutions.parquet	0.1 MB
NV	us_nv_constitutions.parquet	0.1 MB
MI	us_mi_constitutions.parquet	0.1 MB
SD	us_sd_constitutions.parquet	0.1 MB
MS	us_ms_constitutions.parquet	0.1 MB
NM	us_nm_constitutions.parquet	0.1 MB
NE	us_ne_constitutions.parquet	0.1 MB
DE	us_de_constitutions.parquet	0.1 MB
WY	us_wy_constitutions.parquet	0.1 MB
WV	us_wv_constitutions.parquet	0.1 MB
KY	us_ky_constitutions.parquet	0.1 MB
NJ	us_nj_constitutions.parquet	0.1 MB
VA	us_va_constitutions.parquet	0.1 MB
PA	us_pa_constitutions.parquet	0.1 MB
UT	us_ut_constitutions.parquet	0.1 MB
SC	us_sc_constitutions.parquet	0.1 MB
ID	us_id_constitutions.parquet	0.1 MB
ND	us_nd_constitutions.parquet	0.1 MB
ME	us_me_constitutions.parquet	0.1 MB
WI	us_wi_constitutions.parquet	0.1 MB
NH	us_nh_constitutions.parquet	0.1 MB
NC	us_nc_constitutions.parquet	0.1 MB
HI	us_hi_constitutions.parquet	0.0 MB
KS	us_ks_constitutions.parquet	0.0 MB
CT	us_ct_constitutions.parquet	0.0 MB
AK	us_ak_constitutions.parquet	0.0 MB
MT	us_mt_constitutions.parquet	0.0 MB
IL	us_il_constitutions.parquet	0.0 MB
IA	us_ia_constitutions.parquet	0.0 MB
TN	us_tn_constitutions.parquet	0.0 MB
RI	us_ri_constitutions.parquet	0.0 MB
MA	us_ma_constitutions.parquet	0.0 MB
MN	us_mn_constitutions.parquet	0.0 MB
IN	us_in_constitutions.parquet	0.0 MB
PR	us_pr_constitutions.parquet	0.0 MB
VT	us_vt_constitutions.parquet	0.0 MB
FEDERAL	us_federal_constitutions.parquet	0.0 MB

Past CFR editions (historical, superseded text)

Jur.	File	Size
FEDERAL	us_federal_cfr_annual.parquet	1006.1 MB

Federal agency decisions, guidance, treaties and other documents

Corpus	File	Size
proposed_regulation	us_federal_proposed_regulation.parquet	938.9 MB
board_decision	us_federal_board_decision.parquet	831.1 MB
session_law	us_federal_session_law.parquet	206.0 MB
ftc_administrative_decision	us_federal_ftc_administrative_decision.parquet	175.3 MB
irs_written_determination	us_federal_irs_written_determination.parquet	132.4 MB
statute_compilation	us_federal_statute_compilation.parquet	58.0 MB
notice	us_federal_notice.parquet	52.5 MB
ag_opinion	us_ar_ag_opinion.parquet	29.9 MB
ag_opinion	us_al_ag_opinion.parquet	20.8 MB
mspb_decision	us_federal_mspb_decision.parquet	20.4 MB
ag_opinion	us_in_ag_opinion.parquet	19.4 MB
sec_adjudication	us_federal_sec_adjudication.parquet	16.9 MB
bia_precedent_decision	us_federal_bia_precedent_decision.parquet	16.3 MB
ag_opinion	us_tx_ag_opinion.parquet	15.4 MB
ag_opinion	us_wa_ag_opinion.parquet	13.8 MB
ag_opinion	us_fl_ag_opinion.parquet	13.3 MB
adjudication	us_federal_adjudication.parquet	13.2 MB
ag_opinion	us_ca_ag_opinion.parquet	12.5 MB
ag_opinion	us_mo_ag_opinion.parquet	11.6 MB
ag_opinion	us_nd_ag_opinion.parquet	11.5 MB
ag_opinion	us_oh_ag_opinion.parquet	10.6 MB
private_law	us_federal_private_law.parquet	9.9 MB
ruling	us_federal_ruling.parquet	9.1 MB
ag_opinion	us_ok_ag_opinion.parquet	8.9 MB
ag_opinion	us_tn_ag_opinion.parquet	8.9 MB
ag_opinion	us_la_ag_opinion.parquet	8.0 MB
ag_opinion	us_mt_ag_opinion.parquet	7.3 MB
treaty	us_federal_treaty.parquet	7.0 MB
cfpb_enforcement_action	us_federal_cfpb_enforcement_action.parquet	7.0 MB
ag_opinion	us_md_ag_opinion.parquet	5.2 MB
ag_opinion	us_ne_ag_opinion.parquet	4.9 MB
irs_rev_proc	us_federal_irs_rev_proc.parquet	4.5 MB
ag_opinion	us_il_ag_opinion.parquet	4.5 MB
irs_notice	us_federal_irs_notice.parquet	4.0 MB
proclamation	us_federal_proclamation.parquet	3.4 MB
ag_opinion	us_ak_ag_opinion.parquet	3.0 MB
ag_opinion	us_me_ag_opinion.parquet	2.9 MB
ag_opinion	us_sd_ag_opinion.parquet	2.9 MB
ag_opinion	us_de_ag_opinion.parquet	2.5 MB
ag_opinion	us_nc_ag_opinion.parquet	2.3 MB
ag_opinion	us_ct_ag_opinion.parquet	2.3 MB
executive_order	us_federal_executive_order.parquet	2.2 MB
ag_opinion	us_ky_ag_opinion.parquet	2.1 MB
ag_opinion	us_pa_ag_opinion.parquet	1.9 MB
guideline	us_federal_guideline.parquet	1.6 MB
ag_opinion	us_ma_ag_opinion.parquet	1.5 MB
ag_opinion	us_ny_ag_opinion.parquet	1.4 MB
ag_opinion	us_ga_ag_opinion.parquet	1.3 MB
ag_opinion	us_or_ag_opinion.parquet	1.2 MB
ag_opinion	us_id_ag_opinion.parquet	1.1 MB
faq	us_federal_faq.parquet	1.0 MB
ag_opinion	us_ms_ag_opinion.parquet	0.9 MB
ag_opinion	us_az_ag_opinion.parquet	0.8 MB
ag_opinion	us_wv_ag_opinion.parquet	0.7 MB
ag_opinion	us_co_ag_opinion.parquet	0.7 MB
enforcement_action	us_federal_enforcement_action.parquet	0.7 MB
ag_opinion	us_pr_ag_opinion.parquet	0.6 MB
ag_opinion	us_hi_ag_opinion.parquet	0.5 MB
memorandum	us_federal_memorandum.parquet	0.4 MB
presidential_document	us_federal_presidential_document.parquet	0.4 MB
ag_opinion	us_mn_ag_opinion.parquet	0.4 MB
irs_rev_rul	us_federal_irs_rev_rul.parquet	0.3 MB
irs_announcement	us_federal_irs_announcement.parquet	0.2 MB
ag_opinion	us_ks_ag_opinion.parquet	0.2 MB
ag_opinion	us_dc_ag_opinion.parquet	0.2 MB
ag_opinion	us_nv_ag_opinion.parquet	0.2 MB
resolution	us_federal_resolution.parquet	0.2 MB
ag_opinion	us_nj_ag_opinion.parquet	0.1 MB
ag_opinion	us_vt_ag_opinion.parquet	0.1 MB
administrative_guidance	us_federal_administrative_guidance.parquet	0.0 MB
administrative_guidance	us_dc_administrative_guidance.parquet	0.0 MB

Total 6.91 GB across 308 Parquet files.