Joseph Robert Sealy (1907 – 1 August 2000) was an English botanist.
He began his career in botany in 1925, working at Kew Gardens, with Thomas Archibald Sprague in the tropical crops section.
Later, in 1927, he worked in a herbarium with Arthur William Hill.
His specialty was the Flora of China, especially Camellia.
In his personal life he was married to fellow botanist and colleague Stella Ross-Craig (1906–2006).