John Alexander Tilleard (born circa 1850, died 22 September 1913) was a British solicitor and the philatelist who was the first curator of the Royal Philatelic Collection. John Tilleard was a solicitor of the City of London. He spent his free time on collect stamps and the study of philately. He was a specialist of stamps issued by Prince Edward Island and British India. About the latter, he published Notes on the De La Rue Series of Adhesive Postage Stamps and Telegraph Stamps of India published in 1896.