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)
Harris County Pollution Control Carbon Disulfide
Harris County Public Health COVID-19 Data Hub. All data are provisional and subject to change. Data will be updated once a day at 4pm.
p2
p2
The objective of this work is to determine how concrete batch plants are impacting surrounding residents and whether certain communities are more at risk by assessing citizen complaints and characteristics of the communities where plants are located in Harris County, Houston, TX.
The objective of this work is to determine how concrete batch plants are impacting surrounding residents and whether certain communities are more at risk by assessing citizen complaints and characteristics of the communities where plants are located in Harris County, Houston, TX.
The objective of this work is to determine how concrete batch plants are impacting surrounding residents and whether certain communities are more at risk by assessing citizen complaints and characteristics of the communities where plants are located in Harris County, Houston, TX.
The objective of this work is to determine how concrete batch plants are impacting surrounding residents and whether certain communities are more at risk by assessing citizen complaints and characteristics of the communities where plants are located in Harris County, Houston, TX.
The objective of this work is to determine how concrete batch plants are impacting surrounding residents and whether certain communities are more at risk by assessing citizen complaints and characteristics of the communities where plants are located in Harris County, Houston, TX.
The objective of this work is to determine how concrete batch plants are impacting surrounding residents and whether certain communities are more at risk by assessing citizen complaints and characteristics of the communities where plants are located in Harris County, Houston, TX.
Stage 2 Environment
Stage 2
Demo
Stage 2 Environment
The Following Data is for Stage 2 Environment
Harris County Public Health COVID-19 Threat Level Indicators. All data are provisional and subject to change. Data will be updated once a day at 4pm.
Harris County Public Health COVID-19 Threat Level Indicators. All data are provisional and subject to change. Data will be updated once a day at 4pm.
Demo
Demo
Demo
Parcel polygon is the delineation of the property boundary
U.S. Census tracts provides boundaries and demographic information for the U.S. Census tracts within the United States. The boundaries are consistent with the tract, county, and state data sets.
Centauri Location
2/5/24 Harris County Parks per precinct as specified by precinct contacts. Attribute data is best information available at time of publishing. Schema change and cleanup for use with cartegraph.
p2
Government Boundaries dataset include Houston City Limit boundary,City Council Districts, MUDs, Super Neighborhoods, Tax Incentive Reinvestment Zones (TIRZ), School Distircts, Lambert Grid, and zipcode.
GIS data files downloaded from HCAD (http://pdata.hcad.org) 7/24/2026.
GIS data files downloaded from HCAD (http://pdata.hcad.org) 7/29/24 GIS Parcel data is updated quarterly by HCAD GIS personnel and uploaded to repository. The last HCAD update was July 2024 next update April 2025
This feature class was digitized from legal descriptions by the City of Houston Planning and Development Department, GIS Services Division. The legal descriptions originate from the Planning and Development Department Public Policy Division; their legality is established with the…
GIS data files downloaded from HCAD (http://pdata.hcad.org) 7/29/24 GIS Parcel data is updated quarterly by HCAD GIS personnel and uploaded to repository. The last HCAD update was July 2024 next update April 2025
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.