Houston Open Data Explorer

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)
SourceWhat it isItemsLoaded
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. 3,11216
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. 2,8880
Houston Advanced Research Center (HARC) ArcGIS Online
services2.arcgis.com
Environmental and regional research layers; source of the 2021 city cool-center list. 5281
City of Houston GIS (ArcGIS Hubs)
geohub.houstontx.gov
Two Hub sites (Public Works geohub, citywide mycity) over several ArcGIS servers. Official. 314119
Harris County Flood Control District ArcGIS Online
services2.arcgis.com
High-water marks, floodplains, projects, acreage by program. Source of the storm HWM layers. 2654
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. 940
U.S. Census Bureau
api.census.gov
43
FEMA (OpenFEMA and National Flood Hazard Layer)
www.fema.gov
43
U.S. Environmental Protection Agency
data.epa.gov
22
Centers for Disease Control and Prevention
data.cdc.gov
22
Texas Commission on Environmental Quality
www.tceq.texas.gov
21
Texas Water Development Board
www.twdb.texas.gov
11
U.S. Geological Survey water data
waterservices.usgs.gov
10
City of Houston 311 public data extracts
www.houstontx.gov
11
METRO (Harris County transit)
www.ridemetro.org
10
Stanford Open Policing Project
openpolicing.stanford.edu
10
TxDOT Crash Records Information System (CRIS)
cris.dot.state.tx.us
10

1,550 matches (likely staff working copies and non-Houston research layers hidden)

Not loaded

Complaint County

Harris County ArcGIS Online · layer · point

Harris County Complaint in County

Harris County ArcGIS Online · layer · point

Complaint PCS in COH

Harris County ArcGIS Online · layer · point

Harris County Pollution Control CBP 2021

Harris County ArcGIS Online · layer · polygon

Constable patrol area subdivision of Harris County

Harris County ArcGIS Online · layer · point

Harris County constable precinct office locations used by Harris Co. ITC. The pedigree of this data is unknown.

Not loaded

County Fuel Tanks

Harris County ArcGIS Online · layer · point

Tanks from HC US Fuel Management office update as of 7/10

Harris County ArcGIS Online · layer · point

Texas Harris County COVID19 Public Map by Harris County Public Health

Harris County ArcGIS Online · layer · point

Texas Harris County COVID19 Public Map by Harris County Public Health

Harris County ArcGIS Online · layer · point

COVID-19 Preliminary Vaccine Providers

Not loaded

crashdata

Harris County ArcGIS Online · layer · point
Not loaded

Crime Gulfton

Harris County ArcGIS Online · layer · polygon
Not loaded

CYFair Schools

Harris County ArcGIS Online · layer · point
Not loaded

DangerousSites

Harris County ArcGIS Online · layer · point

Harris County Dangerous Sites

Harris County ArcGIS Online · layer · point

Harris County Pollution Control Dangerous Sites

Not loaded

Debris Photos

Harris County ArcGIS Online · layer · point
Not loaded

DebrisZones2023

Harris County ArcGIS Online · layer · polygon

* * * FINAL AS OF 8/4/2014 * * * Displays debris maintenance sub-zones within each Precinct. Used to determine responsibility for specific road maintenance during an event, such as a hurricane.

Add a dataset

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.