Uniform is worn in school, going to and from school and on all school related occasions unless the Vice Principals permit otherwise. The full school uniform is checked by the Form Teacher each morning.

Suppliers of the school uniform are:

PE and Sports Clothing: Indoor shoes, football boots, football jerseys (in house colours), white shorts, school socks (maroon and gold) and swimming shorts. A track suit, while not compulsory, is recommended in colder weather. Football jerseys in house colours, and school football socks can be purchased in the school in September.

Students may wear a plain black hat and plain black gloves when travelling to and from school. All students must wear a blazer coming to and going from school. Fleeces may not be worn in class. Only school fleeces may be worn over blazers.
 
Inappropriate hairstyles, including braids, are not permitted. Boys’ hair must be not longer than collar length nor shorter than a No 2 cut all over. Boys must be clean shaven.
 
Boys and girls may wear one plain finger ring. Girls may wear a plain stud in each ear.
 
Any item of clothing or jewellery worn in contravention of school uniform regulations is liable to confiscation.
 
All Y13 and Y14 students must wear the Senior School tie.
 
The school authorities reserve the right to determine the acceptable standards of uniform, dress and appearance of students attending St Patrick's Grammar School. 

Only solid white vests are worn underneath the shirt.

The Pioneer pin, the Life symbol, Prefect badge and the Fáinne are the only emblems or badges permissible on the uniform. Black shoes must be worn going to and from school.

Breaches of the dress code will result in disciplinary action.