ONIX Code Lists Issue 67, October 2024

List 77: US and Canada (excluding Québec) school or college grade

Value Description Notes
P Preschool Age typically 0-4 years
K Kindergarten Age typically 5 years
1 First Grade Age typically 6 years
2 Second Grade Age typically 7 years
3 Third Grade Age typically 8 years
4 Fourth Grade Age typically 9 years
5 Fifth Grade Age typically 10 years
6 Sixth Grade Age typically 11 years
7 Seventh Grade Age typically 12 years
8 Eighth Grade Age typically 13 years
9 Ninth Grade High School Freshman – age typically 14 years
10 Tenth Grade High School Sophomore – age typically 15 years
11 Eleventh Grade High School Junior – age typically 16 years
12 Twelfth Grade High School Senior – age typically 17 years
13 College Freshman Age typically 18 years
14 College Sophomore Age typically 19 years
15 College Junior Age typically 20 years
16 College Senior Age typically 21 years
17 College Graduate Student Age typically 22+ years