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Mt Roskill — New Zealand Election Results

Compiled by EveryElectionResult.com's data team · Last updated 2026-08-30

Mt Roskill was won by National Party at the 2023 general election, with a margin of 1,564 votes over Labour Party in the electorate vote. This page covers every general election in Mt Roskill from 1999 to 2023.

New Zealand uses Mixed-Member Proportional (MMP) voting: every voter casts two votes each election. The electorate vote below elects this seat's local MP by simple plurality (the same "winner by margin" model this site uses everywhere) — it does not by itself determine how many seats a party holds in Parliament. The separate party vote, shown further down, is what decides each party's overall share of Parliament, and often goes to a different party than the local electorate vote does.

Electorate Vote — Full History, 1999–2023

Election Winner Party Votes Vote Share Runner-up Margin
1999 Labour Party Labour Party 18,475 58.3% National Party (8,768) 9,707 (30.6 pts)
2002 Labour Party Labour Party 18,702 64.4% National Party (4,987) 13,715 (47.2 pts)
2005 Labour Party Labour Party 19,476 59.9% National Party (9,581) 9,895 (30.5 pts)
2008 Labour Party Labour Party 18,615 55.8% National Party (12,197) 6,418 (19.2 pts)
2011 Labour Party Labour Party 17,906 57.1% National Party (10,635) 7,271 (23.2 pts)
2014 Labour Party Labour Party 18,637 56.5% National Party (10,546) 8,091 (24.5 pts)
2017 Labour Party Labour Party 19,094 55.3% National Party (12,196) 6,898 (20.0 pts)
2020 Labour Party Labour Party 23,050 61.8% National Party (9,197) 13,853 (37.2 pts)
2023 National Party National Party 15,659 44.3% Labour Party (14,095) 1,564 (4.4 pts)

Party Vote in Mt Roskill

The party vote is cast on the same ballot but decides Parliament's overall makeup, not this seat's MP. Shown here for the same years as the electorate vote above, so the two can be compared directly.

ElectionParty Vote WinnerVotesShareSame as electorate vote?
1999 Labour Party 14,702 45.8% Yes
2002 Labour Party 14,866 49.7% Yes
2005 Labour Party 16,501 49.7% Yes
2008 Labour Party 14,533 42.6% Yes
2011 Labour Party 14,098 43.6% Yes
2014 National Party 14,275 42.1% No -- split result
2017 National Party 15,248 43.0% No -- split result
2020 Labour Party 21,436 56.2% Yes
2023 National Party 15,828 43.4% Yes

Full Result Breakdown by Election

1999

PartyVotesShare
Labour Party18,47558.3%
National Party8,76827.7%
Alliance1,1903.8%
ACT Party8942.8%
Green Party8902.8%
Other7482.4%
NZ First5851.8%
United Future1550.5%

2002

PartyVotesShare
Labour Party18,70264.4%
National Party4,98717.2%
ACT Party1,4945.1%
NZ First1,3014.5%
United Future1,2534.3%
Other1,0763.7%
Jim Anderton's Progressive2290.8%

2005

PartyVotesShare
Labour Party19,47659.9%
National Party9,58129.5%
ACT Party1,8825.8%
United Future8602.6%
Other4361.3%
Jim Anderton's Progressive2570.8%

2008

PartyVotesShare
Labour Party18,61555.8%
National Party12,19736.6%
Green Party1,0863.3%
ACT Party7182.2%
Other3771.1%
United Future2110.6%
Jim Anderton's Progressive1550.5%

2011

PartyVotesShare
Labour Party17,90657.1%
National Party10,63533.9%
Green Party1,2584.0%
Other7492.4%
NZ First4681.5%
ACT Party2400.8%
United Future770.2%

2014

PartyVotesShare
Labour Party18,63756.5%
National Party10,54632.0%
Green Party1,6825.1%
Other1,3944.2%
NZ First7172.2%

2017

PartyVotesShare
Labour Party19,09455.3%
National Party12,19635.3%
Green Party1,2543.6%
Other1,1633.4%
NZ First8462.4%

2020

PartyVotesShare
Labour Party23,05061.8%
National Party9,19724.7%
Green Party2,2616.1%
Other1,3963.7%
ACT Party1,3713.7%

2023

PartyVotesShare
National Party15,65944.3%
Labour Party14,09539.9%
Green Party3,3799.6%
ACT Party2,1796.2%

Margin Over Time

Electorate-vote winning margin (percentage points) at each election, coloured by the winning party.

1999: Labour Party margin 30.6 pts 2002: Labour Party margin 47.2 pts 2005: Labour Party margin 30.5 pts 2008: Labour Party margin 19.2 pts 2011: Labour Party margin 23.2 pts 2014: Labour Party margin 24.5 pts 2017: Labour Party margin 20.0 pts 2020: Labour Party margin 37.2 pts 2023: National Party margin 4.4 pts 1999 2002 2005 2008 2011 2014 2017 2020 2023

Trend

Mt Roskill has been contested at 9 general elections on record since 1999. Winning parties of the electorate vote over that span: Labour Party, National Party.

Frequently Asked Questions

Who won Mt Roskill in the 2023 general election?

National Party won the Mt Roskill electorate vote in 2023 with 15,659 votes (44.3%), a margin of 1,564 votes over Labour Party in second place.

Did the electorate vote and party vote agree in Mt Roskill in 2023?

Yes -- National Party won both the electorate vote and the party vote in Mt Roskill in 2023.

Which parties have won the Mt Roskill electorate seat since 1999?

Since 1999, Mt Roskill has been won by: Labour Party, National Party.

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