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)
Key Map for Harris County
Harris County Blue Sky Ammonia
Key Map Grid
Harris County Blue Sky H2S
Harris County Pollution Control Blue Sky SO2
Kinder Community Tabulation Area Clip of Pct2
The community tabulation areas (CTAs) developed by the Kinder Institute are designed to serve as approximations of neighborhoods, based specifically on census geographic boundaries, to facilitate the aggregation of census data to geographies larger than census tracts, but smaller…
The dataset includes publicly accessible, K-12 & College, and Special Access Required Coastal Prairie.
The dataset includes publicly accessible, K-12 & College, and Special Access Required Coastal Prairie.
[Administration and Regulatory Affairs] The knowledge base that 311 call-takers use to answer callers questions
SWQM sampling stations in the Lake Livingston area (Lower Trinity-Kickapoo - HUC 8 watershed). Sys_Class field is defined by HARC. Sampling stations are sites where surface water quality data are collected by the TCEQ and its partner agencies (such as the Clean Rivers Program, US…
Displays Lambert grid coverage for H-GAC region and surrounding areas. Lambert grids are used to divide aerial imagery data into uniform tiles for distribution and cataloging.
Harris County Landfill Type I
Harris County Landfill Type IV
collection of HCSO District Beats
The Following Map has the latest Lead Abatement Homes from 2002 - 2022
The Following Map has the latest Lead Abatement Homes from 2002 - 2022
Vegetation Canopy Coverage by Census Tract.
Known locations of Low Impact Development projects in the greater Houston-Galveston region.
[Finance Department] Listing of all vendors. SPD E-Catalog resource note: This file contains odd formatting and spacing and will need to be cleaned up prior to being machine readable. Note this is...
[Legacy Portal] List of Electric Vehicle Charging Stations. Known Electric Vehicle Charging Stations in and around the City of Houston, as maintained by the Mayor's Office of Sustainability...
Drainage Network alignment. Little Cypress Channel Breaks for Jeremy Justice.
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.