In the United States, students in fifth grade are generally 10 to 11 years old. Students may be slightly older or younger depending on their academic readiness, as well as what month they were born.
In general, students are typically 5 years old when they begin kindergarten. However, the kindergarten cut-off dates vary for each state. Some states have moved the kindergarten start date back so that children are slightly older when they begin school, making them slightly older when they begin fifth grade. In California, for example, the kindergarten cut-off date moved from December 1st to September 1st. With a later cut-off date, it is possible for precocious students to begin fifth grade when they are 9 years old.