About Us » History


In the late 1800s, several influential members representing the Archdiocese of Philadelphia began to discuss the need for a school to educate women of the Delaware Valley. Father (later Bishop) McDevitt and Mrs. Mary McMichan were the leaders in the founding five “High School Centres” in 1901 which paved the way for the building of Catholic Girls High School in 1911. Upon the death of Mary McMichan, the name of the school was changed to John W. Hallahan Catholic Girls' High School in honor of her brother, as she requested. More than 37,000 young women have earned diplomas from Hallahan and have dedicated their talents and lives to society in such callings as mothers, medical professionals, educators and business executives throughout the nation and the world.

Let a floodtide of song
From our hearts pour along
O girls of the Hallahan High!
For the Mother whose art
Doth her knowledge impart
As religion’s grand ally.
She has given us dow’r
Of the mightiest pow’r
Enrolled us ‘neath standard blest,
On whose azure fields triple lily sealed,
Inscribed the Alumnae’s test.
Let our lamp then outgleam
With our Faith’s brightest beam:
O girls of the Hallahan High!
O girls of the Hallahan High!
Let the blue and the white
In their radiant light:
Alma Mater Glorify!
Alma Mater Glorify!