All Saints Catholic Senior College is an independent Roman Catholic co-educational senior secondary day school located in the south-western Sydney suburb of Casula, New South Wales, Australia.

Such a development was already a priority of Liverpool Parish priest Father Roth Delaney and together they lobbied government and Catholic education office bearers while raising community support and funding for the school.

[2][3] Originally planned for Ashcroft, land negotiations lead to the final site location in Leacocks Lane, Casula.

Following a rapid ten-week construction, the current Leacocks Lane campus was opened in 1988 with 380 students and 29 teaching staff.

[4] The College was officially blessed on Sunday 27 March 1988 by Archbishop Edward Clancy after which permanent building construction began.