Preheat oven to 350 degrees Fahrenheit; grease a 9x5 inch loaf pan.

Whisk flour, baking powder, and salt in a medium bowl.

Cream butter and sugar in a large bowl until light and fluffy.

Beat in eggs one at a time; stir in vanilla.

Gradually mix dry ingredients into wet until just combined.

Gently fold in diced mango.

Pour into prepared pan; bake 50 to 60 minutes, or until a toothpick inserted in center comes out clean.

Cool in pan 10 minutes; transfer to a wire rack.