Eliza I of Valvexia
| embed = | name = Eliza I | title = Her Majesty | titletext = | more = | type = | image = | image_size = | alt = | caption =
| succession = Queen of Valvexia
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| reign = 5 August 1194 – 4 May 1223
| reign-type = Reign
| coronation = 15 August 1194
Saint Luca Cathedral, Antople
| cor-type = Coronation
| predecessor = Charles I
| pre-type = Predecessor
| successor = Daniel I
| suc-type = Successor
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| birth_name = Eliza Alanzia Marie Halburton
| birth_date = 27 October 1145
| birth_place = Salwood Manor
Salwood, Province of Halburton
| death_date = 4 May 1223
| death_place = Travalle Palace
Antople
| burial_date = 7 May 1223
| burial_place = Halburton Royal Crypt
Salwood Manor
| spouse = William Enwoden
| spouse-type = Prince-Consort
| consort = yes
| issue = none
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| house = Halburton
| house-type = House
| father = Charles I
| mother = Alanzia of Walburton
| religion = Assisanism | occupation = | signature_type = | signature =
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Eliza I of Valvexia (Eliza Alanzia Marie Halburton; 27 October 1145 - 4 May 1223) was queen of Valvexia from 1194 until her death in 1223. Upon her ascention, she became the first female monarch in Valvexian history.