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

Jm

Harris County ArcGIS Online · layer · polyline
Not loaded

Jm2

Harris County ArcGIS Online · layer · polyline
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JP Courthouses

Harris County ArcGIS Online · layer · point

create date= 12-2-2008 Updated with additional information 1/14/19 produced from FPM and HRRM county facilities data for the purpose of isolating Justice of...

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JP Courthouses Web

Harris County ArcGIS Online · layer · point

Updated 6/25/26 Updated Co Updated 1/4/22 produced from FPM and HRRM county facilities data for the purpose of isolating Justice of Peace Courthouses from larger data set which was not descriptive enough to query JP courthouses.

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K2C TaskPoints

Harris County ArcGIS Online · layer · point

This feature service contains point locations for Harris County Precinct 2 Keep2Clean tasks between 2025 and 2026. It supports mapping, tracking, and reporting of cleanup-related Public Works activities across the service area.

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Katy

Harris County ArcGIS Online · layer · polygon

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.

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Katy EXT

Harris County ArcGIS Online · layer · polygon

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.

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KE Sidewalks 2

Harris County ArcGIS Online · layer · polyline
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Key Map

Harris County ArcGIS Online · layer · polygon

Key Map for Harris County

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Key Map Ammonia

Harris County ArcGIS Online · layer · polygon

Harris County Blue Sky Ammonia

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Key Map Grid

Harris County ArcGIS Online · layer · polygon

Key Map Grid

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KeyMapH2S

Harris County ArcGIS Online · layer · polygon

Harris County Blue Sky H2S

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KeyMapSO2

Harris County ArcGIS Online · layer · polygon

Harris County Pollution Control Blue Sky SO2

Not loaded

Kowis St

Harris County ArcGIS Online · layer · polyline
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Landfill Type I

Harris County ArcGIS Online · layer · point

Harris County Landfill Type I

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Landfill Type IV

Harris County ArcGIS Online · layer · point

Harris County Landfill Type IV

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LandUseGulfton

Harris County ArcGIS Online · layer · polygon
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LaporteRd

Harris County ArcGIS Online · layer · polyline
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Law Beats

Harris County ArcGIS Online · layer · polygon

collection of HCSO District Beats

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Legacy projects

Harris County ArcGIS Online · layer · polyline
Not loaded

LILA

Harris County ArcGIS Online · layer · polygon

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.