View source for 90th meridian west

{{Short description|Line of longitude}}
{{Unreferenced|date=January 2021}}
{{Location map-line|lon=-90}}
{{kml}}
The '''meridian 90° west of [[Prime Meridian|Greenwich]]''' is a line of [[longitude]] that extends from the [[North Pole]] across the [[Arctic Ocean]], [[North America]], the [[Gulf of Mexico]], [[Central America]], the [[Pacific Ocean]], the [[Southern Ocean]], and [[Antarctica]] to the [[South Pole]].

In Antarctica, the meridian defines the western limit of [[Chile]]'s [[List of Antarctic territorial claims|territorial claim]]. The land further west is not claimed by any nation.  The meridian also defines the western limit of the Lima, Antofagasta, Santiago, Puerto Montt and Punta Arenas [[flight information region]]s.

The 90th meridian west forms a [[great ellipse]] with the [[90th meridian east]], located midway between the Prime meridian and the [[180th meridian]]; thus, the center of the [[Western Hemisphere]] is on this meridian.

In the United States, the [[Mississippi River]] runs close to the 90th meridian, crossing the meridian several times. The cities of [[St. Louis]], [[Memphis, Tennessee|Memphis]] and [[New Orleans]] are all close to the meridian.

One of the four [[45×90 points|45 x 90 points]] is located in [[Rietbrock, Wisconsin]], where the [[45th parallel north]] intersects with the 90th meridian west, marking the halfway point between the [[North Pole|90° Latitude North]], [[180th meridian|180th Meridian East & West]], [[Equator|0° latitude]], and [[Prime Meridian|0° longitude]].

==From Pole to Pole==
Starting at the [[North Pole]] and heading south to the [[South Pole]], the 90th meridian west passes through:

:{| class="wikitable plainrowheaders"
! scope="col" width="120" | Co-ordinates
! scope="col" | Country, territory or sea
! scope="col" | Notes
|-
| style="background:#b0e0e6;" | {{Coord|90|0|N|90|0|W|type:waterbody|name=Arctic Ocean}}
! scope="row" style="background:#b0e0e6;" | [[Arctic Ocean]]
| style="background:#b0e0e6;" |
|-
| {{Coord|81|54|N|90|0|W|type:country|name=Canada}}
! scope="row" | {{CAN}}
| [[Nunavut]] — [[Ellesmere Island]]
|-
| style="background:#b0e0e6;" | {{Coord|81|1|N|90|0|W|type:waterbody|name=Nansen Sound}}
! scope="row" style="background:#b0e0e6;" | [[Nansen Sound]]
| style="background:#b0e0e6;" |
|-
| {{Coord|80|31|N|90|0|W|type:country|name=Canada}}
! scope="row" | {{CAN}}
| [[Nunavut]] — [[Axel Heiberg Island]]
|-
| style="background:#b0e0e6;" | {{Coord|78|17|N|90|0|W|type:waterbody|name=Norwegian Bay}}
! scope="row" style="background:#b0e0e6;" | [[Norwegian Bay]]
| style="background:#b0e0e6;" |
|-
| {{Coord|77|22|N|90|0|W|type:country|name=Canada}}
! scope="row" | {{CAN}}
| [[Nunavut]] — [[Graham Island (Nunavut)|Graham Island]]
|-
| style="background:#b0e0e6;" | {{Coord|77|13|N|90|0|W|type:waterbody|name=Norwegian Bay}}
! scope="row" style="background:#b0e0e6;" | [[Norwegian Bay]]
| style="background:#b0e0e6;" |
|-
| {{Coord|76|50|N|90|0|W|type:country|name=Canada}}
! scope="row" | {{CAN}}
| [[Nunavut]] — [[North Kent Island]] and [[Devon Island]]
|-
| style="background:#b0e0e6;" | {{Coord|74|34|N|90|0|W|type:waterbody|name=Barrow Strait}}
! scope="row" style="background:#b0e0e6;" | [[Barrow Strait]]
| style="background:#b0e0e6;" |
|-
| {{Coord|74|4|N|90|0|W|type:country|name=Canada}}
! scope="row" | {{CAN}}
| [[Nunavut]] — [[Port Leopold, Prince Leopold Island and Elwin Bay|Prince Leopold Island]]
|-
| style="background:#b0e0e6;" | {{Coord|73|59|N|90|0|W|type:waterbody|name=Prince Regent Inlet}}
! scope="row" style="background:#b0e0e6;" | [[Prince Regent Inlet]]
| style="background:#b0e0e6;" |
|-
| {{Coord|72|4|N|90|0|W|type:country|name=Canada}}
! scope="row" | {{CAN}}
| [[Nunavut]] — [[Baffin Island]]
|-
| style="background:#b0e0e6;" | {{Coord|71|31|N|90|0|W|type:waterbody|name=Gulf of Boothia}}
! scope="row" style="background:#b0e0e6;" | [[Gulf of Boothia]]
| style="background:#b0e0e6;" |
|-
| {{Coord|69|7|N|90|0|W|type:country|name=Canada}}
! scope="row" | {{CAN}}
| [[Nunavut]] — several islands including [[Helen Island]], and the mainland
|-
| style="background:#b0e0e6;" | {{Coord|63|46|N|90|0|W|type:waterbody|name=Hudson Bay}}
! scope="row" style="background:#b0e0e6;" | [[Hudson Bay]]
| style="background:#b0e0e6;" |
|-valign="top"
| {{Coord|57|1|N|90|0|W|type:country|name=Canada}}
! scope="row" | {{CAN}}
| [[Manitoba]]<br/> [[Ontario]] — from {{Coord|56|13|N|90|0|W|type:adm1st|name=Ontario}}
|-
| {{Coord|48|3|N|90|0|W|type:country|name=United States}}
! scope="row" | {{USA}}
| [[Minnesota]]
|-
| style="background:#b0e0e6;" | {{Coord|47|49|N|90|0|W|type:waterbody|name=Lake Superior}}
! scope="row" style="background:#b0e0e6;" | [[Lake Superior]]
| style="background:#b0e0e6;" |
|-valign="top"
| {{Coord|46|41|N|90|0|W|type:country|name=United States}}
! scope="row" | {{USA}} 
| [[Michigan]]<br/> [[Wisconsin]] — from {{Coord|46|19|N|90|0|W|type:adm1st|name=Wisconsin}}, passing through [[Reedsburg, Wisconsin|Reedsburg]] (at {{Coord|43|32|N|90|0|W|display=}}); crosses the [[45th parallel north]] in [[Marathon County, Wisconsin]], having one of the [[45×90 points|45 x 90 points]] (at {{Coord|45|00|N|90|00|W|display=}})<br/> [[Illinois]] — from {{Coord|42|30|N|90|0|W|type:adm1st|name=Illinois}}<br/> [[Missouri]] — from {{Coord|37|58|N|90|0|W|type:adm1st|name=Missouri}}, passing a mile and a half (2 km) east of [[Ste. Genevieve, Missouri|Ste. Genevieve]]<br/> [[Arkansas]] — from {{Coord|36|0|N|90|0|W|type:adm1st|name=Arkansas}}<br/> [[Tennessee]] — from {{Coord|35|33|N|90|0|W|type:adm1st|name=Tennessee}}, passing through [[Memphis, Tennessee|Memphis]] (at {{Coord|35|8|N|90|0|W|type:city|name=Memphis}})<br/> [[Mississippi]] — from {{Coord|35|0|N|90|0|W|type:adm1st|name=Mississippi}}, passing through [[Brandon, Mississippi|Brandon]] (at {{Coord|32|17|N|90|0|W|type:city|name=Brandon}}) a suburb of [[Jackson,_Mississippi|Jackson]] <br/> [[Louisiana]]  — from {{Coord|31|0|N|90|0|W|type:adm1st|name=Louisiana}}, passing through [[New Orleans]] (at {{Coord|30|2.5|N|90|0|W|type:city|name=New Orleans}})
|-
| style="background:#b0e0e6;" | {{Coord|29|13|N|90|0|W|type:waterbody|name=Gulf of Mexico}}
! scope="row" style="background:#b0e0e6;" | [[Gulf of Mexico]]
| style="background:#b0e0e6;" |
|-valign="top"
| {{Coord|21|10|N|90|0|W|type:country|name=Mexico}}
! scope="row" | {{MEX}}
| [[Yucatán (state)|Yucatán]]<br/> [[Campeche]] — from {{Coord|20|28|N|90|0|W|type:adm1st|name=Campeche}}
|-
| {{Coord|17|49|N|90|0|W|type:country|name=Guatemala}}
! scope="row" | {{GTM}}
|Passing through [[Jalapa, Jalapa|Jalapa]]
|-
| {{Coord|13|57|N|90|0|W|type:country|name=El Salvador}}
! scope="row" | {{SLV}}
|[[Ahuachapán Department|Ahuachapán]] — Passing through of Western [[Tacuba]] district (at {{coord|13|54|N|90|0|W|type:adm1st|name=Tacuba}}), Central [[San Francisco Menéndez]] district (at {{coord|13|50|N|90|00|W|type:adm1st|name=San Francisco Menéndez}}), and finishing the [[Barra de Santiago]] canton (at {{coord|13|41|N|90|0|W|type:adm1st|name=Barra de Santiago}}).
|-valign="top"
| style="background:#b0e0e6;" | {{Coord|13|41|N|90|0|W|type:waterbody|name=Pacific Ocean}}
! scope="row" style="background:#b0e0e6;" | [[Pacific Ocean]]
| style="background:#b0e0e6;" | Passing just west of [[Genovesa Island]], [[Galápagos Islands|Galápagos]], {{ECU}} (at {{Coord|0|19|N|89|58|W|type:isle|name=Genovesa Island}})<br/> Passing just east of [[Santa Fe Island]], [[Galápagos Islands|Galápagos]], {{ECU}} (at {{Coord|0|49|S|90|2|W|type:isle|name=Santa Fe Island}})
|-
| style="background:#b0e0e6;" | {{Coord|60|0|S|90|0|W|type:waterbody|name=Southern Ocean}}
! scope="row" style="background:#b0e0e6;" | [[Southern Ocean]]
| style="background:#b0e0e6;" |
|-valign="top"
| {{Coord|72|28|S|90|0|W|type:country|name=Antarctica}}
! scope="row" | [[Antarctica]]
| Border between [[List of Antarctic territorial claims|unclaimed territory]] (to the west) and [[Antártica Chilena Province]] (to the east), claimed by {{CHL}}
|-
|}

{{Long-seq|2}}

==See also==
*[[89th meridian west]]
*[[91st meridian west]]
*[[45×90 points]]
{{-}}
{{geographical coordinates|state=collapsed}}

==References==
{{Reflist}}

[[Category:Meridians (geography)|w090 meridian west]]
[[Category:Borders of Chile]]