Webfourth graders are 9 years old for most of the school year. They can start the year at age 8 if their birthday falls between the beginning of the school year and december 31st, and can end the 4th grade at age 10 if their birthday is after january 1st. Webtypical age of a 4th grader age range. As a parent or educator, understanding the typical age of a 4th grader can provide valuable insight into their. Webin general, 4th graders are typically around 9 to 10 years old. However…