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)
Current, court approved, official data from revised A-1 commissioner precinct map as of 8/11/11. Formerly, Proposed_Comm_Pct2011RevisedA1. Updated to reflect 2016 election results Updated CM3 Commissioner name with election results from Nov. 3, 2020
Fake Data
Bond Overview table for the January 2023 Bond Update to commissioners court.
Fake Data
Project overview table for the January 2023 Bond Update to commissioners court.
FAKE DATA TESTING ONLY
FAKE DATA TESTING ONLY
Bond Program Summary Report Projects for the Jan 31, 2023 Court Agenda.
Bond Program Summary Report Projects for the Jan 31, 2023 Court Agenda.
CES and parks of interest in OST/South Union neighborhood.
Bridge Adventures starring the iconic duo Nathan Alston and Max Gordon.
Feature layer generated from running the Find by Attributes and Location analysis tool.
Feature layer generated from running the Find by Attributes and Location analysis tool.
Harris County Road Log for cataloging managed and unmanaged road segments.
Harris County broadband locations, current as of 220519
Harris County broadband locations, current as of 220519
BS2N 2020
BS2N 2021
BS2N 2022
BS2N 2023
BS2N Construction Start 8/10/2021
Harris County Road Log for cataloging managed and unmanaged road segments.
Buffalo and Brays Bayou
Bus routes are color coded by frequency: Red - Frequent all day service (Goal every 15 minutes or less)Blue - Frequent Peak service, less frequent non-peak service (15 minute peak, 30 minutes or less non peak)Green - Less frequent all day service (31 plus minutes all day)Orange -…
Locations for boarding or alighting the Houston METRO bus system. This data is used for map display, query and analysis in Geographic Information System (GIS) software. This data is also imported into, and used in Trapeze FX, a bus scheduling software. From there, the bus stop lo…
13 Butadiene
This map is for CAMP Location Web App.
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.