Arabella Duval Huntington (née Yarrington; c. 1850/1851 – September 16, 1924) was an American philanthropist and once known as the richest woman in the country as a result of inheritances she received upon the deaths of her husbands.

For the 1921 passenger list for the ship Aquitania, sailing from Cherbourg to New York, Arabella Huntington said she was born in Mobile, Alabama, on February 9, 1851.

[3] In New York, she worked to care for the ailing wife of Collis P. Huntington, a wealthy industrialist and railway magnate whom she may have met in Richmond.

In 1913, she married Henry E. Huntington, a nephew of her late husband, who was also a railway magnate and influential in the Los Angeles area.

Both are buried on the grounds of the Huntington Library, Art Museum and Botanical Gardens, in San Marino, California.

Her particular interests were in Old Masters, Medieval and Renaissance devotional images, and Louis XIV–Louis XV furniture and decorative arts.

These were selected for an exhibition about Arabella Huntington in the spring of 2006, entitled The Belle of San Marino.

[8] Her son Archer M. Huntington shared her love for art and culture and was a patron of museums.

He was also one of the world's leading experts on Spanish poetry and was the founder of the Hispanic Society of America in New York City.