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Data centers in Croatia: 1 project mapped
The biggest data center plan in Croatia is Pantheon Atlas's AI campus on 310 acres of open land near Topusko, about 90 kilometers south of Zagreb: up to 12 billion euros, with up to 1 gigawatt of power. The US investor group announced it in May 2026, and the grid operator HOPS has since approved more than 500 million euros of new power lines and a substation for it. Construction is expected to start in early 2027, with the campus running by early 2029.
The permits are not in hand. The Sisak-Moslavina county plan is being amended to draw the route of about 300 kilometers of new lines, and the environmental studies are still being prepared, Glas Slavonije reported. Landowners where pylons go will be expropriated with a one-time payment. Pantheon says it will not take water from the Glina river or the thermal springs that feed Topusko's spa, and will rely on its own five boreholes; it has promised separate public briefings on water.
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Critics point to the scale. The Croatian partner, Jako Andabak, who owns the land for the planned 500-megawatt solar plant, told the broadcaster HRT the campus would raise Croatia's electricity use by about 20 percent, in a country that already imports much of its power. A column in Nacional argued that Topusko sits at the center of Banovina, where nearby Sisak is still rebuilding homes after the 2020 earthquake, and that the region should not have the decision made over its head.
Croatia's existing data centers are small. Digital Realty's ZAG1 on Selska cesta in Zagreb, the one site listed below, offers 800 kilowatts.
Projects on record, place by place
Open a place to see what is proposed, being built, running or stopped there. The report above may name projects that have no record here yet.
City of Zagreb1
| Project | Company | Status | Power | |
|---|---|---|---|---|
| Digital Realty Zagreb (ZAG1) | Digital Realty | 0.8 MW |
Where this comes from
The reporting above was written from these. Open one and check it yourself.
Every project above is drawn from public records, filings and local reporting. Each row links to what it is based on. Statuses change, so check the source date before you rely on one. Found something wrong? Write to [email protected] and it gets fixed.