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)
Locations for boarding or alighting the Houston METRO bus system. This data is used for map display, query and analysis in Geographic Information System (GIS) software. This data is also imported into, and used in Trapeze FX, a bus scheduling software. From there, the bus stop lo…
Parcel polygon is the delineation of the property boundary
Harris County Most Solid Waste Violation by Complaints
Harris County Most Water Violation with Lab Results
GIS data files downloaded from HCAD (http://pdata.hcad.org) 4/11/23. GIS MUD data is updated quarterly by HCAD GIS personnel and uploaded to repository. The last HCAD update Apr 2023 next update Jan 2024
GIS data files downloaded from HCAD (http://pdata.hcad.org) 4/11/23. GIS MUD data is updated quarterly by HCAD GIS personnel and uploaded to repository. The last HCAD update Apr 2023 next update Jan 2024
GIS data files downloaded from HCAD (http://pdata.hcad.org) 4/11/23. GIS MUD data is updated quarterly by HCAD GIS personnel and uploaded to repository. The last HCAD update Apr 2023 next update Jan 2024
Harris County Mulch Sites
Harris County Solid Waste Mulch & Tire Location
This layer depicts Harris County Mosquito Control's Operational Area Boundaries that were initially created during the formation of the program in order to aid in the application of adulticides by providing for appropriately sized geographic areas which could be sprayed in a give…
Location Tracking Template Service for Collector Apps
Harris County Pollution Control Naphthalene
This data layer is defined by the City of Houston Planning and Development Department and maintained by Neighborhood Planning Division.
New_Cases_Rate
FIFA_Ride_Share_Area
Current, court approved, official commissioner precincts for Harris County TX 2022
Texas, statewide zip code boundaries acquired from Pitney-Bowes
New_OMB_CIP_FY2025
Current, court approved, official commissioner precincts for Harris County TX
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.