Henry Wallis (21 February 1830 - 20 December 1916) was an English Pre-Raphaelite painter, writer and collector.
Wallis was born in London on 21 February 1830, but his father's name and occupation are unknown. When in 1845 his mother, Mary Anne Thomas, married Andrew Wallis, a prosperous London architect, Henry took his stepfather's surname. His artistic training was thorough and influential. He was admitted as a probationer to the RA and enrolled in the Painting School in March 1848. He also studied in Paris at Marc-Charles-Gabriel Gleyre's atelier and at the Academie des Beaux Arts, sometime between 1849 and 1853.