Not loaded
Houston and Harris County publish a huge amount of open data, scattered across dozens of portals nobody tracks. This catalog lists every dataset we've found in one place, whether or not it's loaded into the explorer. Know a source we're missing? Add it, and it's shared with everyone.
| Source | What it is | Items | Loaded |
|---|---|---|---|
| Harris County ArcGIS Online services.arcgis.com |
One organization shared by county departments, precincts and staff. Mixes authoritative layers (fire stations, parks, crashes) with many working copies and one-off maps; review before use. | 3,112 | 16 |
| Rice University ArcGIS Online services.arcgis.com |
Research and class projects. Houston gems (HCFCD buyout lots, draft 2026 FEMA flood map, historical census, redlining) among worldwide student work. Research copies of agency data need permission before reuse. | 2,888 | 0 |
| Houston Advanced Research Center (HARC) ArcGIS Online services2.arcgis.com |
Environmental and regional research layers; source of the 2021 city cool-center list. | 528 | 1 |
| City of Houston GIS (ArcGIS Hubs) geohub.houstontx.gov |
Two Hub sites (Public Works geohub, citywide mycity) over several ArcGIS servers. Official. | 314 | 119 |
| Harris County Flood Control District ArcGIS Online services2.arcgis.com |
High-water marks, floodplains, projects, acreage by program. Source of the storm HWM layers. | 265 | 4 |
| City of Houston Open Data (data.houstontx.gov) data.houstontx.gov |
Separate from the GIS hubs. Mostly spreadsheets; finance (checkbook, payroll, budget) and census stay current, much else frozen since a 2023 migration. | 94 | 0 |
| U.S. Census Bureau api.census.gov |
4 | 3 | |
| FEMA (OpenFEMA and National Flood Hazard Layer) www.fema.gov |
4 | 3 | |
| U.S. Environmental Protection Agency data.epa.gov |
2 | 2 | |
| Centers for Disease Control and Prevention data.cdc.gov |
2 | 2 | |
| Texas Commission on Environmental Quality www.tceq.texas.gov |
2 | 1 | |
| Texas Water Development Board www.twdb.texas.gov |
1 | 1 | |
| U.S. Geological Survey water data waterservices.usgs.gov |
1 | 0 | |
| City of Houston 311 public data extracts www.houstontx.gov |
1 | 1 | |
| METRO (Harris County transit) www.ridemetro.org |
1 | 0 | |
| Stanford Open Policing Project openpolicing.stanford.edu |
1 | 0 | |
| TxDOT Crash Records Information System (CRIS) cris.dot.state.tx.us |
1 | 0 |
1,550 matches (likely staff working copies and non-Houston research layers hidden)
CONGRESSIONAL DISTRICTS enacted by 87th Legislature, 3rd Called Session - PLANC2193
This layer was created by geocoding Universal Services Facility spreadsheet. It should have some overlay with Critical Infrastructure but as of this writing not sure exaclty where. It is related to a table called IP that has the IP addresses of each location.
This layer was created by geocoding Universal Services Facility spreadsheet. It should have some overlay with Critical Infrastructure but as of this writing not sure exaclty where. It is related to a table called IP that has the IP addresses of each location.
March 2025 Vaccination Clinics **SUBJECT TO CHANGE**
Violation County PCS 2022
Violation PCS COH
VMC_ADDRESS_GEOcode
VMC_RelatedClass
VMC_RelatedClass
This Voting Precinct (polygon) dataset created to represented and validate representative jurisdictions within Harris County Texas.
This vector (polygon) dataset represents 1,172 Voting Precincts in Harris County, Texas - effective 02/01/24.
This Voting Precinct (polygon) dataset created to represented and validate representative jurisdictions within Harris County Texas as of January 1, 2026.
Contains multiple tables that are used to design dashboards for VPH data hub 2024
Contains multiple tables that are used to design dashboards for VPH data hub 2024
Contains multiple tables that are used to design dashboards for VPH data hub 2024
Contains multiple tables that are used to design dashboards for VPH data hub 2024
Contains multiple tables that are used to design dashboards for VPH data hub 2024
Contains multiple tables that are used to design dashboards for VPH data hub 2024
Contains multiple tables that are used to design dashboards for VPH data hub 2024
Contains multiple tables that are used to design dashboards for VPH data hub 2024
Contains multiple tables that are used to design dashboards for VPH data hub 2024
Contains multiple tables that are used to design dashboards for VPH data hub 2024
Contains multiple tables that are used to design dashboards for VPH data hub 2024
Found Houston or Harris County open data we don't list? A portal, a map service, a spreadsheet on an agency page, a research dataset? Tell us where it is. Reviewed suggestions are added to the catalog for everyone.