Flatøy is an island in Meland municipality in Hordaland county, Norway. The island is one of the two main islands (the other being Holsnøy) that make up the municipality of Meland. The island lies in the district of Nordhordland, just north of the city of Bergen. The main village on the island is Krossneset on the southern part of the island. The northern part of the island is very sparsely inhabited.