It's not because there's an election coming up - the boundaries of most electorates in the Illawarra could be changing.

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The NSW Electoral Commission has released its draft redistribution of the boundaries of the state's 93 electorates to ensure each one has approximately the same number of voters.

One of the biggest changes in the region is in the northern Illawarra, where suburbs from Bulli up to Coledale will shift from Ryan Park's Keira electorate to Liberal Lee Evans' seat of Heathcote.

It meas Mr Evans' seat is now a combination of the northern Illawarra and southern Sydney - similar to what it was at the 2011 poll.

"It's a bit of a tale of two cities and their distinctive cultures," Mr Evans said.

"There's a different culture in both [areas] and it's quite marked."

While Mr Park has picked up the Mt Kembla-Cordeaux Heights area, he wasn't pleased to lose the northern Illawarra.

"I never like losing areas, particularly when I have worked really closely with many local residents and community groups, but boundary changes are a part of the job," Mr Park said.

Shellharbour MP Anna Watson will lose the Kanahooka area - picked up by Paul Scully in Wollongong - to allow for the expected growth in West Dapto.

"I've been through boundary changes before and, while I'm sad to lose that area because it's a big part of my electorate and I've done a lot of work within the electorate. they will be well represented by Paul Scully and I'll continue working within the boundaries that have been set," Ms Watson said.

The changes to Mr Scully's seat likely make it even safer for Labor but he said he didn't give "where lines on the map are drawn" much consideration.

"It's an independent process - I think members who work hard will have that work recognised by the constituents no matter who they might be," Mr Scully said.

Gareth Ward's Kiama seat is largely unchanged, only losing very small pockets at Shoalhaven Heads and Jerrawangala.

"My electorate's been very good to me," Mr Ward said, "and I'm really pleased to be able to know the boundaries at this stage will be the ones I've had for the last eight years."

The changes can be viewed at elections.nsw.gov.au/redistribution. Public submissions on the proposed changes can be made until December 9.

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