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 |
2,869 matches (likely staff working copies and non-Houston research layers hidden)
Pre and post Hurricane Harvey (8/01/2017-9/26/2017) Ozone data for TCEQ Region 12. Counties: Austin, Brazoria, Chambers, Colorado, Fort Bend, Galveston, Harris, Liberty, Matagorda, Montgomery, Walker, Waller, Wharton.
The hurricane observations data is merged by two data sources - NHC best track(2009-2017) and IBTrACS (1851-2008).
The hurricane tracks data is merged by two data sources - NHC best track(2009-2017) and IBTrACS (1851-2008).
High Water Marks - June 19, 2006
High Water Marks - October 16, 2006
High Water Marks - May 10, 2007
High Water Marks - August 16, 2007
High Water Marks - August 05, 2008
High Water Marks - March 18, 2009
High Water Marks - March 28, 2009
High Water Marks - October 29, 2009
High Water Marks - January 09, 2012
High Water Marks - July 12, 2012
High Water Marks - August 01, 2014
High Water Marks - October 25, 2015
High Water Marks - October 31, 2015
High Water Marks - March 10, 2016
High Water Marks - May 27, 2016
High Water Marks - January 18, 2017
High Water Marks - June 22, 2018
High Water Marks - July 04, 2018
hwys
InterCOP SigActs situational updates — standalone service without FK constraints
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.
Demo
This map layer depicts the climate zone designations used by the U.S. Department of Energy Building America Program by county boundaries (detailed).
Hub keywords: FifthWard_KashmereClusterDashboard;MapServer
Harris County Indicator of Needs Tracts Source: https://www.arcgis.com/home/item.html?id=7abe415ac9ea46ecb98413b88a905958
Heat map of the Industrial Disasters in Houston from 2015 to 2025, ranked by air emission duration using TCEQ reports.
Using TCEQ Air emission database from 2015 to 2025, the geographical coordinates of the location of top 60 incidents by duration has been plotted.
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.