Tulsk was previously a parliamentary borough, one of three in County Roscommon from the period 1663 to 1800 and was a constituency represented in the Irish House of Commons. Under the co-monarchs William III of England and Mary II of England Tulsk was first represented in the Commons by William Caulfeild and William Neave in 1692. The year marked what was to be the beginning of an extended period of dominance for the Protestant Ascendancy. One of the two seats was effectively hereditary in the Caulfeild family.