Mesilla County, New Mexico GenealogyEdit This Page

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United States Gotoarrow.png New Mexico Gotoarrow.png Mesilla County

Mesilla County was a proposed county in a proposed new territory that was never approved and never existed.

In 1857 the people of Arizona (at the time the southern part of modern Arizona and New Mexico) sent Sylvester Mowry to Congress to petition for creation of a new Arizona Territory carved from the southern part of New Mexico Territory. Mowry drew up a map with four proposed counties:

The bill and these proposed counties failed passage.[1] The only known original document mentioning these counties is the map accompanying the failed bill.


  1. Thomas Edwin Farish, History of Arizona (Phoenix, Ariz., 1915), 1:324. HathiTrust Digital Library edition.


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