Static snapshot. This site serves two different things: 1,853 data centres reported by OpenStreetMap contributors nationwide, and 13 sites Helios infers from Arizona parcel records, exported on July 29, 2026. The first is a map of what has been recorded; the second is an argued hypothesis with an evidence chain. This is a point-in-time export, not a live view. See meta.json or the methodology.

Travis County

County in TX · 16 data centres recorded in OpenStreetMap

Mapped facilities
16
on the map today
Floor area
0.13
km² across 14 buildings
Share of US load
140
MW, inferred upper bound
Water
0.30
million gal/day, inferred
2 of these 16 are not mapped as buildings, so no power figure is estimated for them. 2 are campus boundaries covering 0.07 km² of land. The megawatt figure above divides a national total by building floor area, and the area of a land parcel is not floor area. A site still being built consumed none of the electricity that total measures. Both are counted here and left out of the estimate rather than folded into it, so this region's load is understated by however much those represent.

When these appeared on the map

observed, not surveyed
0816202320232024202420242024202520252025
Data centres recorded in OpenStreetMap at the end of each month. The hatched stretch is before 2017-01, when telecom=data_center was not yet in common use — the near-zero readings there describe the tag, not the country. This is a count of what has been mapped, and OpenStreetMap carries no construction dates.

What the grid here looks like

reported by OSM contributors
Substations
92
69 kV and above
Bulk substations
5
230 kV and above
Highest voltage
345
kV, present in this county
Generating capacity
1,989
MW across 22 plants

A facility drawing hundreds of megawatts connects at bulk transmission voltage, so the second figure matters more than the first: forty 69 kV yards are not a substitute for one 500 kV substation. 11 of the plants here carry no capacity tag, so the megawatt total is a floor rather than the region's output.

Proximity is not connection. Nothing here shows that any facility has contracted power from any of these substations. That gets settled in interconnection filings Helios cannot read, and in several regions those queues now run for years. A county showing no substations may have none mapped rather than none standing.

Largest named mapped records

by mapped area
NameOperatorMapped asMapped area m²Share MWFirst mapped
Cortex supercomputernot recordedBuilding39,59143.42025-07-02
CyrusOne Austin Data Center IIInot recordedBuilding17,64419.32023-11-09
Data Foundry - Texas 1not recordedBuilding12,73714.02024-12-20
Data Foundry - Texas 2not recordedBuilding9,74210.72024-12-20
LightEdge Austin IInot recordedBuilding8,0318.82024-12-20
Digital Realty Austin AUS11not recordedBuilding7,4318.12024-12-20
CyrusOne Austin Data Center IInot recordedBuilding7,1877.92023-11-09
Lumen Austin 1not recordedBuilding6,9427.62024-12-20
Element Criticalnot recordedBuilding5,7586.32023-11-14
Data Foundry Austin 1 Data Centernot recordedBuilding4,6885.12023-11-24
Alpheus DataCenterAlpheusBuilding3,3533.72025-03-27
LightEdge Austin Inot recordedBuilding2,8693.12024-12-20
Thin-nologynot recordedBuilding8560.92023-09-27
Lumen Austin 3Lumen TechnologiesBuilding4710.52024-12-20

“First mapped” is when OpenStreetMap recorded the facility, not when it was built — OpenStreetMap carries no construction dates. Mapped area means a building floor plate, campus boundary, or construction polygon according to the “Mapped as” column; those quantities are never added together. The megawatt column appears only for buildings and is their floor-area share of a reported national total, not a measurement.