Harry Alden Richardson (January 1, 1853 – June 16, 1928) was an American businessman and politician from Dover, in Kent County, Delaware.

He attended the common schools there and the Kent Academy in East Greenwich, Rhode Island.

Richardson worked in his father's canning and packing business in Dover, eventually becoming a partner and assuming control in 1894.

He continued in this business throughout his life, was President of the First National Bank of Dover, and was also interested in various public-service corporations.

Richardson died in Dover, and is now buried there in the Lakeside Methodist Episcopal Cemetery.