While in Wongawilli Ms McKay took aim at the Berejiklian Government's "neglect" of West Dapto.

She also met up with Shellharbour MP Anna Watson during her first visit to the Shellharbour electorate since being elected as NSW Labor leader.

The duo again called on the government to commit to building a much-needed new school in West Dapto.

In March this year the then Shadow Minister for Education, Jihad Dib was at the same Wongawilli park with Ms Watson and Keira MP Ryan Park, to announce a $60 million commitment to start the planning and construction of a new school in West Dapto.

The government refused to commit to building a new school in the suburb. They have though committed to a major upgrade of Dapto Public School.

"By the time it is built, it will be over capacity already and there's no plans beyond that," Ms McKay said.

"If you are serious about putting so many people into an area like this, you have to have at a minimum the schools. There needs to be significant planning around this and it's just not happening.

"People are buying into the area because it is a lovely area and good place to live but they do want the infrastructure to support them and it's not just here right now."

The West Dapto Urban Release Area is the largest growth area in the Illawarra, and will include about 19,000 new dwellings and over 50,000 people once complete.

Ms Watson added she was sick of the government treating residents in her electorate as "second class citizens".

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"West Dapto is booming. In the next decade, there will be approximately 19,000 new dwellings and over 50,000 people living here," she said.

"The Berejiklian Government just can't keep ignoring the West Dapto community.

"West Dapto needs a new school, we need a Service NSW Centre and we need better road infrastructure."