Erguël is a medieval seigniory of the Roman Catholic Diocese of Basel, and under protectorate of Biel/Bienne, under military jurisdiction from 1335, in the now called valley of St.-Imier, in the now Bernese Jura, Switzerland.

In 1264, the Bishop of Basel appointed Otto of Erguel as the vogt over the Saint-Imier valley fief.

Otto raised the valley to become a seigniory and parish of the Diocese of Basel, named Erguel.

[3][4] Asteroid 282669 Erguël, discovered by Swiss amateur astronomer Michel Ory at the Tenagra II Observatory in 2005, was named in memory of the seigniory.

[2] The official naming citation was published by the Minor Planet Center on 22 July 2013 (M.P.C.