Seddon, New Zealand
|Time zone||New Zealand Standard Time (UTC+12)|
|• Summer (DST)||New Zealand Daylight Time (UTC+13)|
Seddon is a small town in Marlborough, New Zealand. It is located on State Highway 1, 25 kilometres (16 mi) south of Blenheim and 20 km (12 mi) north of Ward. Seddon is located close to the mouths of the Awatere and Blind Rivers, and also close to the Lake Grassmere salt works.
The population was 510 in the 2006 Census, an increase of 36 from 2001.
The town's best known structure is a joint single-lane road-rail bridge spanning the Awatere River which was in service until October 2007. A two lane road bridge has replaced the road bridge component. The railway line continues over the old historic bridge which is the Main North Line and a daily service in each direction of the TranzCoastal passenger express stops in Seddon.
A train derailment at Blind River, south of Seddon, on 25 February 1948, killed six people and injured 40 others.
The town was named for a former Prime Minister of New Zealand, Richard Seddon.
Seddon has been close to the epicentres of several significant earthquakes.
On the morning of 16 October 1848, Marlborough was struck by a damaging earthquake later estimated to be between magnitude 7.4 and 7.7. The epicentre of this earthquake was 45 km southeast of Seddon. 
In July and August 2013 Seddon was closest settlement to the epicentres of a doublet earthquake event. First, in late July, a series of sizeable earthquakes struck the region over a period of a few days being felt strongly in Blenheim, Wellington and the rest of Central New Zealand, the strongest being a magnitude 6.5 and having its epicentre in Cook Strait. Then on 16 August 2013 a magnitude 6.6 earthquake with its epicentre under Lake Grassmere struck about 2:30 PM  and was followed by a series of aftershocks over the next few hours, one of which was above magnitude 6 and several others above magnitude 5. This came just a few years after devastating earthquakes affected Christchurch, 285 km away.
- Peter Dowling (editor) (2004). Reed New Zealand Atlas. Reed Books. map 67. ISBN 0-7900-0952-8.
- Roger Smith, GeographX (2005). The Geographic Atlas of New Zealand. Robbie Burton. map 147. ISBN 1-877333-20-4.
- "Blenheim". Encyclopedia of New Zealand (1966).
- "Awatere River". Marlborough Online.
- Quickstats about Seddon
- "New Awatere Bridge 'opens' today". The Marlborough Express. 9 November 2007. Archived from the original on 2008-05-17.
- Marlborough Historical Society (2005). Click - A Captured Moment - Marlborough's Early Heritage. p. 65. ISBN 0-473-10475-X.
- "M 7.4 - 7.7, Marlborough, 16 October 1848". Geonet. GNS Science. Retrieved 18 August 2013.
- "New Zealand Earthquake Report Magnitude 7.4, Monday, October 16 1848 at 1:49:04 am (NZST)". Geonet. GNS Science. 24 October 2008. Retrieved 18 August 2013.
- "New Zealand Earthquake Report Magnitude 5.8, Saturday, April 23 1966 at 6:49:40 pm (NZDT)". Geonet. GNS Science. 30 August 1996. Retrieved 18 August 2013.
- "M 5.8, Seddon, 23 April 1966". Geonet. GNS Science. Retrieved 18 August 2013.
- Fenaughty, Kevin (17 August 2013). "Damaging quake hits the north-east of the South Island". Geonet. GNS Science. Retrieved 17 August 2013.
- "Big quake shakes central New Zealand". Stuff.co.nz. 21 July 2013. Retrieved 17 August 2013.
- "Earthquakes rock central New Zealand". Stuff.co.nz. 17 August 2013. Retrieved 17 August 2013.
- Te Kete Ipurangi schools database: Seddon School
Media related to Seddon, New Zealand at Wikimedia Commons