The following table shows all New Zealand electorates to be contested at the 2014 general election, based on the margin between the first and second-placed parties in the 2011 candidate vote.
| National Seats | Labour Seats | ||
| Seat | Margin | Seat | Margin |
| Christchurch Central | NAT 1.33% vs LAB | Wigram | LAB 4.46% vs NAT |
| Port Hills | NAT 2.50% vs LAB | Mana | LAB 6.64% vs NAT |
| Waimakariri | NAT 3.02% vs LAB | West Coast-Tasman | LAB 7.66% vs NAT |
| Maungakiekie | NAT 5.74% vs LAB | Te Atatū | LAB 8.27% vs NAT |
| Auckland Central | NAT 10.60% vs LAB | Te Tai Tonga | LAB 8.83% vs MAORI |
| Napier | NAT 11.81% vs LAB | Dunedin North | LAB 9.12% vs NAT |
| Hamilton West | NAT 13.97% vs LAB | Hutt South | LAB 9.91% vs NAT |
| Ōtaki | NAT 14.02% vs LAB | Palmerston North | LAB 10.2% vs NAT |
| New Plymouth | NAT 14.44% vs LAB | Mount Roskill | LAB 10.59% vs NAT |
| East Coast | NAT 16.65% vs LAB | Dunedin South | LAB 12.12% vs NAT |
| Whanganui | NAT 16.93% vs LAB | Rimutaka | LAB 15.07% vs NAT |
| Rangitata | NAT 17.09% vs LAB | Wellington Central | LAB 17.40% vs NAT |
| Invercargill | NAT 19.79% vs LAB | Christchurch East | LAB 18.82% vs NAT |
| Nelson | NAT 20.51% vs LAB | New Lynn | LAB 22.58% vs NAT |
| Wairarapa | NAT 21.01% vs LAB | Mount Albert | LAB 24.10% vs NAT |
| Hamilton East | NAT 24.37% vs LAB | Rongotai | LAB 25.14% vs NAT |
| Northcote | NAT 29.00% vs LAB | Kelston | LAB 25.31% vs NAT |
| Rotorua | NAT 29.06% vs LAB | Hauraki-Waikato | LAB 35.53% vs MANA |
| Tukituki | NAT 29.12% vs LAB | Manurewa | LAB 36.41% vs NAT |
| Rangitīkei | NAT 29.55% vs LAB | Ikaroa-Rāwhiti | LAB 37.61% vs MAORI |
| Upper Harbour | NAT 30.01% vs LAB | Manukau East | LAB 63.03% vs NAT |
| Rodney | NAT 31.01% vs CON | Māngere | LAB 63.30% vs NAT |
| Papakura | NAT 31.59% vs LAB | ||
| Kaikōura | NAT 34.54% vs LAB | ||
| Northland | NAT 35.95% vs LAB | ||
| Whangarei | NAT 36.74% vs LAB | ||
| Waitaki | NAT 37.34% vs LAB | ||
| Botany | NAT 37.81% vs LAB | ||
| Coromandel | NAT 37.86% vs LAB | ||
| Ilam | NAT 40.07% vs LAB | ||
| North Shore | NAT 41.87% vs LAB | ||
| Taupō | NAT 42.92% vs LAB | ||
| Pakuranga | NAT 44.06% vs LAB | ||
| Helensville | NAT 45.97% vs LAB | ||
| Waikato | NAT 47.23% vs LAB | ||
| Tauranga | NAT 48.56% vs LAB | ||
| Bay of Plenty | NAT 49.69% vs LAB | ||
| Tāmaki | NAT 50.33% vs LAB | Ōhariu | UNF 0.29% vs LAB |
| Taranaki-King Country | NAT 50.82% vs LAB | Tāmaki Makaurau | MAORI 5.31% vs LAB |
| Hunua | NAT 50.86% vs LAB | Te Tai Tokerau | MANA 6.21% vs LAB |
| Clutha-Southland | NAT 52.06% vs LAB | Epsom | ACT 6.68% vs NAT |
| East Coast Bays | NAT 52.49% vs LAB | Waiariki | MAORI 10.59% vs MANA |
| Selwyn | NAT 55.77% vs LAB | Te Tai Hauāuru | MAORI 18.45% vs LAB |