How big is Puerto Rico's transmission network?

OverWatts maps 690 km of transmission line in Puerto Rico, across 84 segments, plus 0 substations. This is mapped length from OpenStreetMap, not an operator-reported total — where OSM is incomplete the figure is a floor, never a ceiling.

What voltage is Puerto Rico's grid?

Most of the mapped network is high voltage (220–379 kV): 690 km of 690 km. The highest voltage tagged anywhere in the country is 230 kV.

How complete is the grid map for Puerto Rico?

Strong — 74.5 km of mapped line per 1,000 km² of land, ahead of 97% of the 153 countries with any mapped grid. Coverage grades how completely OpenStreetMap has drawn the network, not how much network exists; large, sparsely-populated countries score low for geographic reasons alone.

Who operates the grid in Puerto Rico?

Puerto Rico Electric Power Authority, PREPA are tagged as operators on mapped segments. Operator tags are present on 80% of Puerto Rico's segments, so this ranks who is *recorded*, not market share.

Puerto Rico · electricity network

Puerto Rico power grid

OverWatts maps 690 km of Puerto Rico's electricity transmission network across 84 line segments and 0 substations, the 122nd most-mapped grid of 153 countries. Its backbone is high voltage (220–379 kV), carrying 690 km — 100% of the mapped length, with the highest tagged voltage at 230 kV. That works out to 74.5 km per 1,000 km² of land — strong OpenStreetMap coverage, ahead of 97% of mapped countries.

Open the grid lens →Puerto Rico profile →

690 km

Mapped transmission line

Substations

#122

of 153 mapped grids

230 kV

Highest voltage

OpenStreetMap coverage

Strong74.5 km / 1,000 km²ahead of 97% of 153 mapped countries

This grades how completely OpenStreetMap has drawn Puerto Rico's network — not how much network exists. Large, sparsely-populated countries score low for geographic reasons alone, and every kilometre here is mapped length, so the totals are a floor rather than an operator-reported figure. 0% of segments carry a real line name and 80% an operator tag.

Mapped line length by voltage

220–379 kV690 km 100%

84 segments · a segment is credited to the country containing its midpoint, so a border-crossing line counts once, on one side.

Operators tagged on Puerto Rico's network

Puerto Rico Electric Power Authority58 87%
PREPA9 13%

Segment counts from OSM `operator` tags, merged across spellings. Present on 80% of segments — this ranks who is recorded, not market share.

How Puerto Rico compares · mapped grid by country

1. People's Republic of China624,300 km
120. Montenegro753 km
121. Burkina Faso723 km
122. Puerto Rico690 km
123. Bhutan673 km
124. Mauritania630 km

Frequently asked

How big is Puerto Rico's transmission network?: OverWatts maps 690 km of transmission line in Puerto Rico, across 84 segments, plus 0 substations. This is mapped length from OpenStreetMap, not an operator-reported total — where OSM is incomplete the figure is a floor, never a ceiling.
What voltage is Puerto Rico's grid?: Most of the mapped network is high voltage (220–379 kV): 690 km of 690 km. The highest voltage tagged anywhere in the country is 230 kV.
How complete is the grid map for Puerto Rico?: Strong — 74.5 km of mapped line per 1,000 km² of land, ahead of 97% of the 153 countries with any mapped grid. Coverage grades how completely OpenStreetMap has drawn the network, not how much network exists; large, sparsely-populated countries score low for geographic reasons alone.
Who operates the grid in Puerto Rico?: Puerto Rico Electric Power Authority, PREPA are tagged as operators on mapped segments. Operator tags are present on 80% of Puerto Rico's segments, so this ranks who is *recorded*, not market share.

Elsewhere in Puerto Rico

Transmission lines Substations Power plants Data centres

Network geometry: OpenStreetMap (ODbL) © OpenStreetMap contributors, ingested and measured by OverWatts · derived 2026-07-26. Counts every mapped line of 220 kV and above; the map layer draws the ≥380 kV backbone only, so it shows less than is measured here.