Scotch-Irish Americans

===Associate Reformed Church===
While the larger Presbyterian Church was a mix of Scotch-Irish and Yankees from New England, several smaller Presbyterian groups were composed almost entirely of Scotch-Irish, and they display the process of assimilation into the broader American religious culture. Fisk (1968) traces the history of the Associate Reformed Church in the Old Northwest from its formation by a union of Associate and Reformed Presbyterians in 1782 to the merger of this body with the Seceder Scotch-Irish bodies to form the [[United Presbyterian Church of North America|United Presbyterian Church]] in 1858. It became the Associate Reformed Synod of the West and remains centered in the Midwest. It withdrew from the parent body in 1820 because of the drift of the eastern churches toward assimilation into the larger Presbyterian Church with its Yankee traits. The Associate Reformed Synod of the West maintained the characteristics of an immigrant church with Scotch-Irish roots, emphasized the Westminster standards, used only the psalms in public worship, was Sabbatarian, and was strongly abolitionist and anti-Catholic. In the 1850s it exhibited many evidences of assimilation. It showed greater ecumenical interest, greater interest in evangelization of the West and of the cities, and a declining interest in maintaining the unique characteristics of its Scotch-Irish past.<ref>William L. Fisk, "The Associate Reformed Church in the Old Northwest: A Chapter in the Acculturation of the Immigrant", ''Journal of Presbyterian History,'' 1968 46(3): 157–174</ref>