George A. Walker Arnott | |
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| Born | George Arnott Walker Arnott February 6, 1799 Edinburgh, Scotland |
| Died | April 17, 1868 (aged 69) Glasgow, Scotland |
| Resting place | Sighthill Cemetery |
| Education | Milnathort Parish School High School of Edinburgh |
| Occupation | Botanist |
| Spouse | Mary Hay Barclay |
George Arnott Walker Arnott of Arlary FRSE (6 February 1799 – 17 April 1868) was a Scottish botanist. He collaborated with botanists from around the world and served as a regius professor of botany at the University of Glasgow. An orchid genus Arnottia was named in his honour in 1828.