In Northumberland Co but parts of the circuit were in Peterborough Co until 1863.
1852 George Carr
1853 George Carr, Jay S Youmans
1854 - 1855 William H Williams, Jay S Youmans
1856 Edward A Ward, Arthur Browning, D Sutherland
1857 Edward A Ward, William Sanderson, William E Walker
1858 - 1859 Vincent B Howard, Andrew L Peterson
1858 3 churches, 21 preaching places, 1 new church built (Cobourg District Minutes 1858 May 27)
1860 William L Scott, James E Richardson
1861 Ephraim L Koyl, James E Richardson
1862 Ephraim L Koyl
1863 parts given to Hastings Mission, Percy Circuit continues but without Peterborough Co locations.