Houston Open Data Catalog

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.

7,221datasets and layers found

17portals and publishers

153loaded and joinable in the explorer

Where the data lives (17 sources)

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

include working copies and non-Houston items

2,869 matches (likely staff working copies and non-Houston research layers hidden)

In the explorer

Houston Vision Zero Vulnerability Houston Top Quarter

City of Houston GIS (ArcGIS Hubs) · layer · polygon · 216 records · fields · ask about it

Hub keywords: vision zero;vulnerability houston top quarter;transportation;infrastructure;City of Houston;Houston;Texas

In the explorer

Houston Walkable Places Streets

City of Houston GIS (ArcGIS Hubs) · layer · polyline · 633 records · fields · ask about it

Hub keywords: Houston;walkable places streets;planning;p&d;Planning;development;planning and development;City of Houston;Texas

In the explorer

Houston Workforce Solutions Career Offices

City of Houston GIS (ArcGIS Hubs) · layer · point · 29 records · fields · ask about it

Hub keywords: Houston;workforce;workforce solutions career offices;neighborhood services;neighborhood;Neighborhoods;City of Houston;Texas

In the explorer

Houston Zipcodes

City of Houston GIS (ArcGIS Hubs) · layer · polygon · 294 records · fields · ask about it

Hub keywords: Houston;zipcodes;administrative boundaries;Administrative boundary;admin;admin boundary;boundaries;administrative;boundary;City of Houston;Texas

In the explorer