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A '''square mile''' (symbol <b>mi&sup2;</b>) is an [[imperial unit]] which is the [[surface area|area]] of a [[square]] whose side is one [[mile]] (or 5,280 [[foot|feet]]).  That comes out to It is equal to 27,878,400 square feet. 640 [[acre]]s, or [[1 E6 m2|2.589988 square kilometers]].

The [[Public Land Survey System]] of the [[United States]], in use in all states except the original 13, [[Vermont]], [[Texas]], and [[Hawaii]],  [[surveying|lays out]] land into [[township]]s of 36 [[section]]s of one square mile.

''See also'': [[Conversion of units]]
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In [[England]], '''the Square Mile''' is a traditional name for the [[City of London]].

====References====
* Adapted from the [[Wikipedia]] article, "Square mile" http://www.wikipedia.org/wiki/Square_mile August 10, 2003