The Dimond District (/ˈdaɪmənd/) is a neighborhood centered on the intersection of MacArthur Boulevard and Fruitvale Avenue in East Oakland, California, in the United States.

[3] The Dimond Business District is situated among several of Oakland's neighborhoods including Oakmore, Glenview, and Lincoln Highlands.

National (e.g. Safeway, CVS Pharmacy, Peet's Coffee & Tea) and regional retailers (e.g. Farmer Joe's Marketplace, Grand Lake Kitchen) are mingled with locally-owned retail outlets, Dimond Tax Services and mom-and-pop restaurants including La Farine, a French bakery.

Major national banks, a U.S. post office and a branch of the Oakland Public Library are also located in the district.

The intersection of Fruitvale Avenue and MacArthur Boulevard is also a major AC Transit hub including Transbay lines to San Francisco.