Federal electorate · New South Wales

McMahon

McMahon is a federal electorate in New South Wales, held by Chris Bowen of the Australian Labor Party since the 2025 election, by a margin of 9.02 points — a fairly safe seat.

Member for McMahon

Chris Bowen

Australian Labor Party

Their voting record and expenses →

The 2025 result

Final two candidates after preferences were distributed, from the election held 3 May 2025.

Chris BOWENLabor59.02%57,742 votes
Carmen LAZARLiberal40.98%40,093 votes

Margin

9.02%

Fairly Safe

Two-party-preferred swing

-1.46%

to Australian Labor Party

Turnout

90.77%

120,536 enrolled

First preferences in 2025

How the seat voted before preferences were distributed. The Coalition is counted as one figure across its four registrations, and the Greens across both of theirs — in Victoria they contest as GVIC and elsewhere as GRN, which read as two separate minor parties if left unmerged.

Labor45.5%
Coalition26.8%
Independents9.8%
Greens9.1%
One Nation8.7%

Suburbs in McMahon

24 suburbs and localities have residents in this electorate. 12of them also have residents in another one — the percentage is the share of that area’s Census population living here.

Blacktown 65%
Greystanes 94%
St Clair (Penrith - NSW)
Fairfield (NSW) 98%
Smithfield (NSW)
Seven Hills (NSW) 64%
Fairfield West 88%
Fairfield Heights
Erskine Park
Doonside 47%
Minchinbury
Pemulwuy
Prospect (NSW)
Toongabbie (NSW) 31%
Bungarribee
Canley Vale 21%
Horsley Park
Mount Vernon
Cecil Park
Kemps Creek 23%
Wetherill Park 7%
Prairiewood 8%
Orchard Hills 5%
Huntingwood

Postcodes in McMahon

14 postcodes have residents in this electorate. 12of them also have residents in another one — the percentage is the share of that area’s Census population living here.

2148 57%
2165 84%
2145 32%
2759
2164 64%
2147 34%
2767 41%
2770 9%
2146 26%
2178 61%
2166 4%
2175
2176 1%
2748 5%

Where this comes from

Results, margins and turnout are the AEC’s published 2025figures. The margin is derived — the winner’s two-candidate-preferred share minus 50 — and the seat status is the AEC’s own classification.
Suburbs and postcodes come from 2021 Census mesh blocks matched to CED_2025 boundaries, weighted by resident population rather than by area — otherwise a large, largely uninhabited postcode is assigned to whichever division holds the most empty land.
These are an approximation of the AEC’s legal boundaries, so close to a boundary they can differ. To confirm where you are enrolled, check the AEC.

Australian Statistical Geography Standard Edition 3 allocation files and 2021 Census Mesh Block Counts, © Australian Bureau of Statistics.