Rosario Bank is a submerged former atoll in the southern Caribbean Sea, located less than 20 km south of Misteriosa Bank.

It lies within Honduras's exclusive economic zone.

[1] The distance to the Honduran mainland at Punta Patuca in the south is 290 km, and to Banco Chinchorro off the Belize mainland in the west is about 330 km.

The nearest dry land is on the Swan Islands, 112 km to the south.

It is part of a cluster of seamounts of the Cayman mountain range contained in Honduras (Misteriosa, Rosario, Maud, Albion and Viciosas).