In a standard deck of playing cards, how many hearts are there?

In a standard deck of playing cards, there are four suits: hearts, diamonds, clubs, and spades. Each suit contains an equal number of cards, specifically 13 cards. This includes the numbers 2 through 10, along with the face cards: Jack, Queen, King, and the Ace.

When considering hearts, there are indeed 13 cards within the hearts suit. This is true regardless of how the other suits are constructed, as they all follow the same structure of having 13 cards each. Thus, identifying that there are 13 hearts is consistent with the overall design of a standard deck of cards, making this the correct answer.