| Liberal | National | Labor | Total | |
|---|---|---|---|---|
| Old Boundaries | 23 | 7 | 18 | 48 |
| New Boundaries | 20 | 7 | 20 | 47 |
- The enrolment shortfall in the Hunter and on the North Coast has seen all North Coast seats shift south, with Cowper gaining Port Macquarie from Lyne and Lyne gaining Forster-Tuncurry from Paterson.
- Paterson gains the rest of Maitland plus Kurri Kurri from Hunter, resulting in Paterson switching from being a Liberal seat with a margin of 9.8% to being a marginal Labor seat on a margin of 0.4%.
- Hunter also loses Kandos and Rylstone to Calare and areas around Scone to New England while absorbing much of the abolished electorate of Charlton.
- On the Central Coast, the marginal Liberal electorate of Dobell undergoes only minor changes, but enough to turn its Liberal margin of 0.7% into a notional Labor margin of 0.2%.
- The bellwether seat of Eden-Monaro loses the areas around Batemans Bay to Gilmore while gaining Yass from Hume and Tumut from Riverina. The electorate now surrounds the ACT and its Liberal margin increases from 0.6% to an estimated 2.9%.
- Hume loses large areas to Riverina and Hume while shifting into Sydney's outer south-west suburbs in gaining Camden and Narellan from Macarthur.
- Macarthur moves north, losing Liberal voting Camden and Narellan while gaining Labor voting territory from Werriwa. The Liberal margin is cut substantially from 11.4% to 3.3%.
- The Redistribution Commissioners have chosen to break from a long tradition of running Cook inland along the Cronulla peninsula until it reaches a quota. The boundary has been pushed across the Georges River, which avoids Hughes being squeezed into the western suburbs.
- The Cook change has a massive impact on Barton, which shifts north as far as Marrickville Road in Sydney's inner-west and is transformed from being a Liberal seat with a margin of 0.3% into a safe Labor seat with an estimated margin of 4.4%.
- Grayndler gains Balmain and Rozelle while parts of Marrickville are transferred to Barton. The seat now covers most of two state seats currently held by the Greens, though based on 2013 Federal election results Grayndler would be Labor held and the Greens would finish third.
- The electorate of Throsby has been re-named Whitlam in honour of late Prime Minister Gough Whitlam.
| Electorate | Old Margin % | New Margin % | Comments |
|---|---|---|---|
| Banks | LIB 1.8 | LIB 2.6 | Loses parts of Blakehurst and Connells Point to Cook and Hurstille and Beverly Hills to. Parts of Revesby, Panania and East Hills in Hughes at the 2013 election have been moved back into Banks. |
| Barton | LIB 0.3 | ALP 4.4 | Major changes, losing some of the electorate's strongest Liberal voting suburbs in Monterey, Ramsgate, Sandringham and Sans Souci to Cook while gaining solid Labor voting territory as far north as the Bankstown rail line in Marrickville. Gains most of Hurstville from Banks. Transformed from being a very marginal Liberal seat to a marginal Labor seat. |
| Bennelong | LIB 7.8 | LIB 7.8 | Unchanged |
| Berowra | LIB 19.1 | LIB 19.0 | Minor boundary changes only. |
| Blaxland | ALP 11.4 | ALP 11.2 | Significant changes with all neighbouring electorates but Blaxland remains a safe Labor seat. |
| Bradfield | LIB 20.8 | LIB 20.9 | Minor boundary changes only. |
| Calare | NAT 16.0 | NAT 15.0 | Loses Forbes and Parkes to Riverina, gains Wellington and Mudgee from Parkes and Kandos and Rylstone from Hunter. |
| Charlton | ALP 9.2 | - | Abolished, see Hunter. |
| Chifley | ALP 10.6 | ALP 10.9 | Loses Minchinbury to McMahon and parts of Blacktown to Greenway. |
| Cook | LIB 16.4 | LIB 15.8 | Loses the western end of the electorate around Sutherland to Hughes while crossing the Georges River and gaining Liberal voting parts of Banks and Barton. |
| Cowper | NAT 11.7 | NAT 13.2 | Shifts south, losing areas north of Coffs Harbour to Page while gaining Port Macquarie from Lyne. |
| Cunningham | ALP 9.9 | ALP 11.3 | Loses all areas in Sutherland Shire to Hughes while gaining areas around Port Kembla and Warrawong from Throsby. |
| Dobell | LIB 0.7 | ALP 0.2 | Only minor changes but enough to tip this marginal seat from Liberal to Labor. Gains Labor voting booths in the north around Gorokan from Shortland while losing some Liberal voting areas in the south around Terrigal Lagoon to Robertson.. |
| Eden-Monaro | LIB 0.6 | LIB 2.9 | Loses the Batemans Bay area on the coast to Gilmore, gains Yass north of the ACT from Hume, and Tumut to the west of the ACT from Riverina. |
| Farrer | LIB 17.4 | LIB 21.8 | Loses Broken Hill and the north-west corner of the state to Parkes. Gains Griffith, Leeton and Narrandera from Riverina. Loses Lockhart Shire to Riverina. |
| Fowler | ALP 16.8 | ALP 12.9 | Loses areas around Green Valley to Werriwa while gaining Abbotsbury, Bossley Park and Greenfields Park from McMahon, and Villawood from Blaxland. |
| Gilmore | LIB 2.7 | LIB 3.8 | Gains areas around Batemans Bay from Eden-Monaro while losing Labor voting territory around Shellharbour to Whitlam. |
| Grayndler | ALP 20.3 | ALP 18.8 | Loses areas south of the Bankstown rail line in Marrickville to Barton and areas around Ashfield and Croydon to Watson. Gains Balmain and Rozelle from Sydney. |
| Greenway | ALP 3.0 | ALP 3.0 | Minor changes only. |
| Hughes | LIB 10.7 | LIB 11.8 | Loses areas north of the Georges River in Bankstown and Liverpool councils to Banks, Blaxland and Fowler. Gains the southern parts of Sutherland Shire from Cunningham and the western part of Cook around Sutherland. |
| Hume | LIB 11.5 | LIB 13.6 | Shifts towards the metropolitan area, losing Yass to Eden-Monaro, Cootamundra, Cowra and Young to Riverina while gaining suburban Camden and Narellan from Macarthur. |
| Hunter | ALP 3.7 | ALP 5.7 | Gains most of the electorate of Charlton, loses Maitland and Kurri Kurri to Paterson, Kandos and Rylstone to Calare and areas around Scone to New England. |
| Kingsford-Smith | ALP 2.7 | ALP 2.7 | Unchanged |
| Lindsay | LIB 3.0 | LIB 3.0 | Unchanged |
| Lyne | NAT 14.8 | NAT 13.6 | Loses Port Macquarie to Cowper and gains Forster-Tuncurry and everything north of Port Stephens from Paterson. |
| Macarthur | LIB 11.4 | LIB 3.3 | Loses Camden and Narellan to Hume while gaining more Labor voting areas in Campbelltown Council from Werriwa. |
| Mackellar | LIB 18.8 | LIB 18.8 | Unchanged |
| Macquarie | LIB 4.5 | LIB 4.5 | Unchanged |
| McMahon | ALP 5.3 | ALP 5.4 | Gains Minchinbury from Chifley, parts of Guildford and Granville from Blaxland and parts of Merrylands from Parramatta. Loses Abbotsbury, Bossley Park and Greenfields Park to Fowler. |
| Mitchell | LIB 22.1 | LIB 21.4 | Minor changes only. |
| New England | NAT 20.7 | NAT 19.6 | Loses Gunnedah to Parkes while gaining areas around Scone from Hunter and Bingara from Parkes. |
| Newcastle | ALP 8.8 | ALP 9.4 | Loses Beresfield and Woodberry to Paterson, gains areas around Wallsend from Charlton. |
| North Sydney | LIB 15.9 | LIB 15.7 | Minor changes only. |
| Page | NAT 2.5 | NAT 3.1 | Loses Ballina to Richmond in exchange for areas around Nimbin, while also gaining areas between the Clarence River and northern Coffs Harbour from Cowper. |
| Parkes | NAT 22.4 | NAT 19.9 | Loses Mudgee and Wellington to Calare while gaining Gunnedah from New England and Broken Hill from Farrer. |
| Parramatta | ALP 0.6 | ALP 1.3 | Minor changes only. |
| Paterson | LIB 9.8 | ALP 0.4 | Transformed into a notional Labor seat after losing Forster-Tuncurry and everything north of Port Stephens to Lyne while gaining Maitland and Kurri Kurri from Hunter and Beresfield and Woodberry from Newcastle. |
| Reid | LIB 0.9 | LIB 3.4 | Amongst other changes loses Auburn to Blaxland and gains Strathfield from Watson. |
| Richmond | ALP 3.0 | ALP 1.6 | Loses the area around Nimbin to Page in exchange for Ballina. |
| Riverina | NAT 21.2 | NAT 19.0 | Shifts east and north, losing Griffith, Leeton and Narrandera to Farrer, gaining Forbes and Parkes from Calare and Cowra, Cootamundra and Young from Hume. |
| Robertson | LIB 3.0 | LIB 3.1 | Minor changes only. |
| Shortland | ALP 7.2 | ALP 7.4 | Gains areas around the northern end of Lake Macquarie from Charlton. |
| Sydney | ALP 14.7 | ALP 12.9 | Loses Balmain and Rozelle to Grayndler in exchange for parts of Camperdown and Newtown, gains Woolloomooloo, Darlinghurst and Kings Cross from Wentworth. |
| Throsby | - | - | Re-named Whitlam. |
| Warringah | LIB 15.4 | LIB 15.3 | Minor changes only. |
| Watson | ALP 6.8 | ALP 8.9 | Gains parts of Canterbury and Ashfield, loses Strathfield to Reid. |
| Wentworth | LIB 17.7 | LIB 18.9 | Loses Darlinghurst, Woolloomooloo and Kings Cross to Sydney. |
| Werriwa | ALP 2.2 | ALP 6.5 | Loses some northern suburbs of Campbelltown to Macarthur, gains Green Valley from Fowler. |
| Whitlam | ALP 7.8 | ALP 6.9 | New name for electorate previously known as Throsby. Loses areas around Port Kembla and Warrawong to Cunningham while gaining areas around Warilla and Shellharbour from Gilmore. |
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