St.Mary's School is part of the St.Mary's Parish, which covers Sea Lake, Nandaly, Berriwillock and Culgoa. Sea Lake is in the heart of the Mallee. The major source of employment for the area is in agriculture. Sea Lake is well known for its hot climate.

St. Mary's is dedicated towards quality teaching and learning.

The school was established 1958 years ago and will celebrate its Jubilee in 2008.