These are the top 10 emoji used in the U.S according to Apple
Apple recently published an overview of its differential privacy technology on macOS Sierra and iOS 10 or later, which includes an interesting chart on the top 10 emoji used by U.S English speakers.
While there are no concrete numbers, it is obvious that the "Face with Tears of Joy" is the most popular emoji followed by the red heart, loudly crying face, heart eyes face, face throwing a kiss, face with rolling eyes, skull, smiling face with smiling eyes, weary face and thinking face.
Apple's differential privacy technology allows the company to collect and compile anonymized data from a large pool of users while maintaining the privacy of individual users. This not only protects the privacy of user activity, it also helps Apple gain insight to improve to the intelligence and usability of its software features such as emoji suggestions and QuickType suggestions.