Wahlbergøya is an island in Hinlopen Strait, between Spitsbergen and Nordaustlandet of the Svalbard archipelago. The island has an area of about . The islands highest point is 194 m.a.s.l. Named after Swedish botanist Peter Fredrik Wahlberg. It is the largest island of Vaigattøyane.
The island is included in the Nordaust-Svalbard Nature Reserve.
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