Theodore Henry Adolphus Fielding was an English painter, engraver, and author.

Fielding was the eldest son of Nathan Theodore Fielding. Like his brothers Copley and Thales he painted in watercolours, and in 1799 sent to the Royal Academy A View of the North Tyne, near Billingham, Northumberland. In 1814 he sent to the British Institution A Sleeping Bacchus. He continued to exhibit at both exhibitions, but it is sometimes difficult to distinguish his works from those of his younger brother, Thales Fielding.

In 1826 he was appointed teacher of drawing and perspective at the East India Company's Military Seminary at Addiscombe. He was popular with the cadets, and was nicknamed "Johnny Bleu" (from his Frenchified pronunciation of that colour).

He lived near Addiscombe, at Croydon, until his death on 11 July 1851, at the age of seventy.