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- Transmission Line80,968
- Power Plant32,429
- Substation / Converter7,614
- Oil & Gas Field7,055
- Coal / Uranium Mine5,382
- Pipeline4,951
- Cement Plant3,513
- Data Centre3,283
- Iron & Steel Plant1,293
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- Grid Storage965
- Iron Ore Mine949
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- Interconnector704
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Chokepoints
Nigeria · electricity network
Nigeria power grid
OverWatts maps 6,822 km of Nigeria's electricity transmission network across 228 line segments and 17 substations, the 43rd most-mapped grid of 153 countries. Its backbone is high voltage (220–379 kV), carrying 6,822 km — 100% of the mapped length, with the highest tagged voltage at 330 kV. That works out to 7.5 km per 1,000 km² of land — partial OpenStreetMap coverage, ahead of 28% of mapped countries. It is connected to 2 neighbouring grids by 290 MW of existing cross-border transfer capacity, with a further 1,100 MW planned.
OpenStreetMap coverage
This grades how completely OpenStreetMap has drawn Nigeria'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. 4% of segments carry a real line name and 7% an operator tag.
Mapped line length by voltage
- 220–379 kV6,822 km 100%
228 segments · a segment is credited to the country containing its midpoint, so a border-crossing line counts once, on one side.
Cross-border links from Nigeria
290 MW existing · 1.1 GW planned · capacities from the Global Transmission Database v0.1 (CC BY 4.0), existing as of 2023
On the interactive map
Load against the network
Where there is room to connect a new load depends on published hosting capacity, which most operators release only as their own map. OverWatts does not yet ingest those feeds, so these are the density measures the open data supports — generation and mapped demand against mapped network — not a headroom figure.
Operators tagged on Nigeria's network
Segment counts from OSM `operator` tags, merged across spellings. Present on 7% of segments — this ranks who is recorded, not market share.
How Nigeria compares · mapped grid by country
- 1. People's Republic of China624,300 km
- 41. Malaysia7,290 km
- 42. Belarus6,884 km
- 43. Nigeria6,822 km
- 44. Finland6,783 km
- 45. Turkmenistan6,639 km
Frequently asked
- How big is Nigeria's transmission network?
- OverWatts maps 6,822 km of transmission line in Nigeria, across 228 segments, plus 17 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 Nigeria's grid?
- Most of the mapped network is high voltage (220–379 kV): 6,822 km of 6,822 km. The highest voltage tagged anywhere in the country is 330 kV.
- How complete is the grid map for Nigeria?
- Partial — 7.5 km of mapped line per 1,000 km² of land, ahead of 28% 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 Nigeria?
- Transmission Company of Nigeria are tagged as operators on mapped segments. Operator tags are present on 7% of Nigeria's segments, so this ranks who is *recorded*, not market share.
- What interconnectors connect Nigeria to its neighbours?
- 290 MW of cross-border transfer capacity to Benin, Niger, plus 1,100 MW planned. Capacities are from the Global Transmission Database (v1.0, 2023).
Elsewhere in Nigeria
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.