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

505 matches (likely staff working copies and non-Houston research layers hidden)

Houston Advanced Research Center (HARC) ArcGIS Online · layer · point

Superfund consists of interrelated, but distinct programs that evaluate and clean up contaminated sites.

Not loaded

TCEQ SWQM Stations

Houston Advanced Research Center (HARC) ArcGIS Online · layer · point

Sampling stations are sites where surface water quality data are collected by the TCEQ and its partner agencies.

Not loaded

TCEQ Texas WPPs

Houston Advanced Research Center (HARC) ArcGIS Online · layer · polygon

Provide the watershed boundaires and information to the public and other governmental organizations about completed or developing 9-element WPPs in TX

Houston Advanced Research Center (HARC) ArcGIS Online · layer · point

TCEQ trash counts dataset.

Houston Advanced Research Center (HARC) ArcGIS Online · layer · point

The TCEQ Voluntary Cleanup Program (VCP) Sites layer is used to identify the geographic location of all "Active and Inactive VCP" sites within the State of Texas. This data layer can be used for a variety of purposes, including: the plotting of VCP sites on maps; utilization by f…

Houston Advanced Research Center (HARC) ArcGIS Online · layer · polygon

Waste site location density within census tracts in Texas compared to social vulnerability of the population within the census tract.

Houston Advanced Research Center (HARC) ArcGIS Online · layer · polygon

The District layer is used to identify the geographic location of water districts within the state of Texas. This information is used by state and local...

Houston Advanced Research Center (HARC) ArcGIS Online · layer · point

The health advisories are issued by TDSHS Seafood to inform consumers about potential health hazards associated with consumption of contaminated fish.

Houston Advanced Research Center (HARC) ArcGIS Online · layer · polygon

It us a subset of the National Hydrigraphy Dataset that has been filtered and modified for the TPWD Inland Fisheries Division and general agency use.

Houston Advanced Research Center (HARC) ArcGIS Online · layer · polyline

Seafood consumption and health advisories for Texas rivers in 2018.

Houston Advanced Research Center (HARC) ArcGIS Online · layer · polygon

Seafood consumption and health advisories for Texas sea water bodies.

Houston Advanced Research Center (HARC) ArcGIS Online · layer · polygon

Seafood consumption and health advisories for Texas sea water bodies. It chanded due to Bayport Channel Collision – May 11, 2019.

Houston Advanced Research Center (HARC) ArcGIS Online · layer · polygon

A water body is declared prohibited waters when a serious or imminent threat to public health has been identified.

Houston Advanced Research Center (HARC) ArcGIS Online · layer · polygon

Overlay the 2014-2025 shellfish harvesting data to show which areas have been harvested the most along the Texas Coast.

Not loaded

TEPRI TDU Boundary

Houston Advanced Research Center (HARC) ArcGIS Online · layer · polygon

Map of the Texas competitive electric market by transmission and distribution utility (TDU) created by the Texas Energy Poverty Research Institute (TEPRI) by...

Not loaded

Texas Area Codes

Houston Advanced Research Center (HARC) ArcGIS Online · layer · polygon

Texas Area Codes

Houston Advanced Research Center (HARC) ArcGIS Online · layer · polygon

To improve the appearance of shapes at small scales, areas are represented with fewer vertices than detailed TIGER/Line equivalents. These boundary files take up less disk space than their ungeneralized counterparts. Cartographic boundary files take less time to render on scree…

Not loaded

Texas Census Tracts

Houston Advanced Research Center (HARC) ArcGIS Online · layer · polygon

To improve the appearance of shapes at small scales, areas are represented with fewer vertices than detailed TIGER/Line equivalents. These boundary files take up less disk space than their ungeneralized counterparts. Cartographic boundary files take less time to render on scree…

Houston Advanced Research Center (HARC) ArcGIS Online · layer · polygon

In order for others to use the information in the Census MAF/TIGER database in a geographic information system (GIS) or for othergeographic applications, the Census Bureau releases to the public extracts of the database in the form of TIGER/Line Shapefiles.

Houston Advanced Research Center (HARC) ArcGIS Online · layer · polygon

In order for others to use the information in the Census MAF/TIGER database in a geographic information system (GIS) or for othergeographic applications, the Census Bureau releases to the public extracts of the database in the form of TIGER/Line Shapefiles.

Not loaded

Texas Cities Places

Houston Advanced Research Center (HARC) ArcGIS Online · layer · polygon

Cities and places in Texas a defined by US Census.

Houston Advanced Research Center (HARC) ArcGIS Online · layer · point

Centroids of cities and places in Texas a defined by US Census.

Not loaded

Texas Coastal Zone

Houston Advanced Research Center (HARC) ArcGIS Online · layer · polygon

Counties along Texas coast that comprise the Texas Coastal Zone. Dissolved from Texas_Counties_Political dataset.

Houston Advanced Research Center (HARC) ArcGIS Online · layer · polygon

Representation of areas that fall within each COG boundary

Houston Advanced Research Center (HARC) ArcGIS Online · layer · polygon

Texas Counties per US Census showing coastline delineations.

Houston Advanced Research Center (HARC) ArcGIS Online · layer · polygon

Texas Counties per US Census showing full political boundary delineations.

Houston Advanced Research Center (HARC) ArcGIS Online · layer · polygon

Texas_Counties_Political simplied boundary. For time series app usage.

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.