
A family association or family organization is an organization formed by people who share a common ancestor or surname. They join for a variety of purposes, including exchanging genealogical information, sharing current news about family members, having reunions, and promoting family pride and unity among living descendants. Family organizations or associations centered on a more distant common ancestor are often referred to as "ancestral family organizations," while those centered on a commonly shared surname are commonly referred to as "single surname family organizations".

Eng Family Benevolent Association, also referred to as Eng Suey Sun Association, was founded by members of the Wu (伍) clan, who emigrated from China to various parts of the world while seeking out a better life. Note that the Chinese surname 伍 is transliterated to a number of forms. Examples are: Wu, Ng, Eng, Ing, or Ang.

The Hubbell Center is the museum, library, and archive of the Hubbell family in North America.
The Jeonju Lee Royal Family Association is a family association from South Korea, and it was founded by the Jeonju Yi (Lee) clan, the household of Joseon and the Korean Empire, which were the ruling house of the whole Korea. The association originated from several national institutions of Joseon dynasty, and its recent main activities, after the World War II, include holding annual Jongmyo jerye, the worship rites of the royal ancestors, and compiling genealogy books of the descendants from the House of Yi.

Kongsi is a Hokkien transcription term meaning "company", especially businesses which have been incorporated. However, the word has other meanings under different historical contexts. Kongsi were most commonly known as Chinese social organizations or partnerships, but the term was also used for various Chinese institutions. Amongst overseas Chinese, the word kongsi was applied to reference both clan organizations, whose members shared a common descent, and to district-dialect clubs, for Chinese immigrants originating from the same district speaking the same dialect. In the late 19th century, these district-dialect associations came to be known as hui guan or hwee kuan, especially in San Francisco, California where many Chinese immigrants went for the California gold rush.

The Plantagenet Alliance was a small grouping of individuals claiming to be descendants of the House of Plantagenet. The Alliance was formed in 2013 shortly after the discovery and identification of the remains of Richard III, the last Plantagenet king of England who died in 1485, in order to advance their views on the location of Richard's reburial. Reports of the number of members of the Alliance varied between fifteen and around forty.

The Pratt family is made up of the descendants of the Mormon pioneer brothers, Parley Parker Pratt and his brother Orson Pratt, whose father was Jared Pratt (1769–1839). It has many members in Utah, and other parts of the U.S. There are many branches of the Pratt family, such as the Romney Family and the Huntsman family.

The Romanov Family Association is an organization for descendants of the former Russian Imperial House. It was created in 1979 and officially registered in Switzerland. The current head of the organization is Princess Olga Andreevna.