The microfilms were produced by the Archives of Ontario from records in possession of the Clerk of the United Counties of Northumberland and Durham dating from 1849 to 1870. This collection includes the rolls of the towns, villages and townships of the United Counties arranged in alphabetical order as follows: Alnwick, Bowmanville town, Brighton, Brighton village, Cartwright, Cavan, Clarke, Cobourg town, Colbourne Village, Cramahe, Darlington, Haldimand, Hamilton, Hope, Manvers, Monaghan South, Murray, Newcastle village, Percy, Port Hope town, and Seymour.

This fonds consists of microfilmed copies of 3 volumes, which include 2 registers of baptisms (1852-1893), and one register of burials (1851-1906).

The microfilms are copies of the 1851 and 1861 decennial nominal census for Peterborough County and parts of Prescott and Prince Edward Counties. Also included (reel 4) is the 1851 census for the Townships of Minden, Stanhope, and Dysart.

The microfilms are copies of assessment and census rolls, 1803-1850, voter's lists, 1854, and poll books, 1816, 1820, 1824 for the Newcastle District. Area covered includes various townships in the present-day counties of Peterborough, Northumberland, Durham and Victoria. The townships of Hamilton and Haldimand were not filmed.

These census consists of microfilm copies of the Library and Archives Canada decennial and nominal census for Northumberland and Durham Counties from 1851, 1861 and 1871.

Series consists of five microfilm reels of the decennial nominal census, of 1881, of Peterborough, Victoria, Hastings, Durham and Northumberland Counties. This collection includes the census of the towns, villages, and townships of Hastings County (north) and are listed as follows: Marmora Lake, Wollaston, Monteagle, Hershel, Wicklow, McClure, Bangor, Mayo, Carlo, Grimsthorpe, Elzevir, Dungannon, Faraday, Cashel, Limerick, Tudor, Sabine, Airey, Lyell, Murchison and Robinson; also Northumberland County (east), including Cramahe, Colborne (village), Brighton, Brighton (village), Murray, Percy, Seymour, Campbellford (village) and Hastings (village). Included also is Northumberland County (west) encompassing Alnwick, Haldimand, Hamilton, and Cobourg (town); and Peterborough County (east), which includes Ashburnham (village), Norwood (village), Burleigh, Anstruther, Chandos, Harvey, Galway, Cavendish, Belmont, Methuen, Hastings (village), Asphodel, Stanhope, Sherborne, McClintock, Dudley, Dysart, Harcourt, Snowden, Glamorgan, Monmouth, Cardiff, Minden, Douro, Otonabee, and Dummer. Also included is Peterborough County (west), encompassing Peterborough (town), Smith, Monaghan (north), Monaghan (south), and Ennismore; also Durham County (east), which includes Hope, Port Hope (town), Cavan, Manvers, Millbrook (village); also Durham County (west), which includes Darlington, Newcastle (village), Clarke, Cartwright, and Bowmanville (town); also Victoria County (south), which includes Ops, Lindsay (town), Mariposa, Emily, Verulam, Omemee (village), and Bobcaygeon (village); also Victoria County (north), which includes Eldon, Fenelon, Fenelon Falls (village), Carden, Dalton, Bexley, Somerville, Digby, Laxton, Longford, Lutterworth, Hindon, and Anson; also Muskoka, which includes Morrison, Gravenhurst (village), Muskoka, Wood, Medora, Monk, Cardwell, Watt, Conger, Humphrey, Oakley, Ryde, Draper, Bracebridge (village), Macauly, Brunel, Stephenson, Ridout, McLean, Sinclair, Franklin, Proudfoot, Chaffey, Bethune, Perry, McDougall, Cowper, and Foley.

Series consists of census records for Victoria, Peterborough, Northumberland and Durham Counties from 1891.

Microfilm copy of nominal, decennial census of Victoria County and Durham (East) County for 1871. The census for Durham East includes only the Townships of Cavan and Manvers.

This fonds consists of microfilm of municipal and other records produced by the Archives of Ontario. It includes assessment and collectors rolls, 1852-1886, as well as voters lists and poll books, 1866-1867. Also included are receipts and expenditures, 1868 and the minutes of North Monaghan Intellectual Improvement Society.

Collection consists of microfilmed copies of census records. Collection is organized into series by census/set of microfilm.

The microfilms are copies of the decennial nominal census for Peterborough County from 1871. The microfilm also includes census records for parts of Northumberland East, Prince Edward and Hastings Counties.

The Microfilm are copies of the Library and Archives Canada decennial, nominal census for the County of Victoria, 1851 and 1861. Also included on the microfilm are the nominal census for Stormont County, 1861 and Waterloo County, 1861.

The assessment and census returns contained in this microfilm are taken from the Journals of the Assembly of Upper Canada and its successor, the Assembly of United Canada from 1824 to 1850.