History
1900 – Penshurst is an outlying bushland district on the new Illawarra railway.
1907 – Fr O’Driscoll builds and opens St Declan’s Church/School on the present site. He arranges for the two Sisters of Charity to come there each day from their convent in Hurstville.
1908 – School has 71 pupils.
1914 – Sisters of Charity agree to hand over management of the school to the Sisters of St Joseph. The school develops as a primary school with classes from Kindergarten to sixth class. The older boys above third class, attend the Marist Brothers School at Kogarah.
1960’s – Archdiocesan authorities rationalise the provision of Catholic education, and by 1968, secondary classes are ended at St Declan’s.
1972 – A new classroom wing is constructed, and in 1990 an administration, staff area and library is added. Enrolments remain strong.
1986 – Sisters of St Joseph end their 70-year leadership of the school.
1993 – Marist Brothers’ Penshurst end primary classes and St Declan’s becomes a fully co-educational primary school with classes from Kindergarten to Year 6.
2000 – There are 427 boys and girls from Kindergarten to Year 6.
2005 – Plans commence to once again extend the school. Property is purchased adjacent to the school and plans are drawn for new buildings and the refurbishment of older ones. The Resource Centre is also refurbished.
2010 – The new buildings are completed and in 2011, they are officially blessed and opened.