Louise Wüste or Wueste, née Heuser (6 June 1805, Gummersbach - 25 September 1874, Eagle Pass, Texas) was a German-American portrait artist; associated with the Düsseldorfer Malerschule.
She was the first of six children born to the paint and wine merchant, Heinrich Daniel Theodor Heuser (1767–1848), and his wife, Katharina Luisa née Jügel (1776–1841).
In 1824, she married Dr. Peter Wilhelm Leopold Wüste (1795–1832), a frequent guest for musical evenings at the Heuser household.
She therefore went to Düsseldorf, where she studied privately with Friedrich Boser, Karl Ferdinand Sohn, and her brother-in-law, Lessing.
The outbreak of the Civil War severely reduced her income, but she was able to buy a small house in Eagle Pass, not far from her son, Daniel (1830-1882), who had also emigrated and become a merchant.