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 |
505 matches (likely staff working copies and non-Houston research layers hidden)
This data was obtained from City of Houston Department of Health. The data are centers which will open as Cooling Centers during Extreme Heat Events (when a Heat Alert is issued).
309 Gulfton Circular Route
A Tree Equity Score is a metric that helps cities assess how well they are delivering equitable tree canopy cover to all residents. The score combines measures of tree canopy cover need and priority for trees in urban neighborhoods (defined as Census Block Groups). It is derived …
Trash cleanups data used in Galveston Bay Report Card. It's courtesy of Bayou Greenways.
STOP Texas Litter sites. Updated: 01/25/2021
eBird trends data. Each 27km x 27km region is represented by a circle polygon scaled by the relative abundance. For more info, please check https://science.ebird.org/en/status-and-trends/faq
ATSDR’s Geospatial Research, Analysis & Services Program (GRASP) created the Social Vulnerability Index (SVI) to help public health officials and emergency response planners identify and map the communities that will most likely need support before, during, and after a hazardous …
ATSDR’s Geospatial Research, Analysis & Services Program (GRASP) created the Social Vulnerability Index (SVI) to help public health officials and emergency response planners identify and map the communities that will most likely need support before, during, and after a hazardous …
Visualizes the Minority Health Social Vulnerability Index, an extension of the CDC/ATSDR Social Vulnerability Index 2018
U.S. low life expectancy at birth by census tract for the period 2010-2015. Average life expectancy data developed as a collaboration between NCHS, the National Association for Public Health Statistics and Information Systems, and the Robert Wood Johnson Foundation. This data is …
ATSDR’s Geospatial Research, Analysis & Services Program (GRASP) created the Social Vulnerability Index (SVI) to help public health officials and emergency...
ATSDR’s Geospatial Research, Analysis & Services Program (GRASP) created the Social Vulnerability Index (SVI) to help public health officials and emergency...
ATSDR’s Geospatial Research, Analysis & Services Program (GRASP) created the Social Vulnerability Index (SVI) to help public health officials and emergency...
ATSDR’s Geospatial Research, Analysis & Services Program (GRASP) created the Social Vulnerability Index (SVI) to help public health officials and emergency...
ATSDR’s Geospatial Research, Analysis & Services Program (GRASP) created the Social Vulnerability Index (SVI) to help public health officials and emergency...
ATSDR’s Geospatial Research, Analysis & Services Program (GRASP) created the Social Vulnerability Index (SVI) to help public health officials and emergency response planners identify and map the communities that will most likely need support before, during, and after a hazardous …
ATSDR’s Geospatial Research, Analysis & Services Program (GRASP) created the Social Vulnerability Index (SVI) to help public health officials and emergency response planners identify and map the communities that will most likely need support before, during, and after a hazardous …
The CDC\ATSDR Social Vulnerability Index (SVI) is a tool, created by the Geospatial Research, Analysis and Services Program (GRASP), to help public health officials and emergency response planners identify and map the communities that will most likely need support before, during,…
The CDC\ATSDR Social Vulnerability Index (SVI) is a tool, created by the Geospatial Research, Analysis and Services Program (GRASP), to help public health officials and emergency response planners identify and map the communities that will most likely need support before, during,…
The National Risk Index Census tract-level data for the Risk Index. December 2025 Release. NOAA CCAP 2021 natural land classifications.
The Climate and Economic Justice Screening Tool provides important information by identifying communities that experience high burdens. These communities are considered disadvantaged. This information will be used for the Justice40 Initiative. The current version of the tool is 1…
City of Conroe City Limits.
City of Conroe ETJ.
City of Houston City Limits.
The city of Houston's complete community boundary.
2012 council districtsthese districts were created from harris county voting tabulation districts which are based off census blocks. this data does not always meet existing boundaries of city limits and parcels.if you have questions about any particuar district please reference o…
City of Houston ETJ.
Management district boundaries of Houston.
This data was obtained from the City of Houston Department of Health. This data is relavent as of 2014.
Weatherization of Low-income homes data. The status field is whether they were weatherized or not.
City of Houston Super Neighborhoods boundaries.
Recycling and disposal sites operated by City of Houston Solid Waste Management Department.
City of Shenandoah City Limits.
City of Shenandoah ETJ.
Cornell eBird database birds data.
County Summary Stats in all classes and all years.
Texas counties with the stay-at-home order issued date for COVID-19.
The purpose of this analysis is to show the extent to which Texas residents reduced average daily travel during COVID-19 pandemic.
NOAA National Centers for Environmental Information (NCEI) rain gage station used for the development of the Double Bayou Watershed Protection Plan.
Double Bayou subwatershed project boundary as used in development of and analysis for the watershed protection planning efforts.
Double Bayou subwatershed project boundary as used in development of and analysis for the watershed protection planning efforts.
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.