Because it is situated on Yonge Street, the dividing line between the townships of King and Whitchurch, it is not considered to be in either township. However, in the censuses of 1851 and 1861, people were listed in township where they lived. Aurora was not pinpointed as a census place till 1871.
When York Region replaced York County in 1971, Aurora had its boundaries redrawn so that it now includes areas that were previously in the townships of King and Whitchurch.
Ontario GenWeb has a sketchmap of the original townships of York County and York GenWeb provides another sketchmap of the equivalent municipalities in York Region (established 1971). Note that after 1971 the boundaries of the towns of Newmarket, Aurora and Richmond Hill are defined. These towns were all separately incorporated from the townships many years before that date, but none would have had such a large geographical footprint.
The map of York County circa 1951 from Ontario Archives locates the individual municipalities, townships, city, towns and villages of the county. (Click at the bottom of the page to see the map enlarged.)
This section is a condensation of an article in Wikipedia.
Lieutenant-Governor John Graves Simcoe gave the order for Yonge Street to be extended to Holland Landing in 1793, the way was paved for the establishment of a community where Aurora now stands.
In 1804, Richard Machell became the first merchant at the cross roads of Yonge and Wellington and the hamlet soon became known as Machell's Corners.
Charles Doan was another early businessman at Machell's Corners and became the first postmaster and later the first reeve. As postmaster, he was influential in renaming the village Aurora.
With the coming of the railway in 1853, Aurora emerged as an important centre north of Toronto. The Fleury plow works (proprietors: the local Fleury family) was established soon after and Aurora was on its way to becoming a flourishing industrial town.
The population of Aurora in 1863 was 700, and by 1888 it had grown to become a town of 2,107 residents. With some ups and downs in growth over the years, Aurora is now a flourishing town with a strong commercial and industrial base.
Worthy of note is the fact that Aurora was the childhood home of Lester B. Pearson, Prime Minister of Canada from 1963–1968, when his father, Rev. Edwin Pearson, was the Methodist minister.
The primary source for basic documents (vital statistics, land records, wills) for people who lived in the Province of Ontario is the Archives of Ontario, 134 Ian Macdonald Blvd, Toronto, Ontario, Canada M7A 2C5.
Civil registration did not begin in the province until 1869. Before then there may be church records of baptisms and burials. For the most part these are still held by the denomination who recorded them. Copies of marriage records made pre-1869 had to be sent by individual clergymen to the registrar of the county in which the marriage took place. These marriage records are available through Ontario Archives, on micorfilm through LDS libraries, and on paid and unpaid websites, but because they were copied at the registrars' offices, they cannot be considered a primary source.
Vital Records after 1869
Birth, marriage and death registrations are not open to the public until a specific number of years after the event occurred. Births to 1914 are now available [October 2012]; dates for marriages and deaths are later. Birth and death registration was not universally carried out in the early years after its adoption. Deaths were more apt to be reported than births for several years. The more rural the area, the less likely it would be that these happenings were reported to the authorities.
Land Records and Wills
Information on how to access land records and wills is best sought on the Archives of Ontario website. An ancestor's land holding might be found on Canadian County Atlas Digital Project if he was in occupancy circa 1878.
Association for the Preservation of Ontario Land Registry Office Documents (APOLROD). A list of Land Registry Offices for all Counties of Ontario.
The original censuses are in the hands of Library and Archives Canada. All of the original census (1851-1911) images are online with the exception of that for 1861. Not all of them are indexed. Later censuses are not yet available. Census divisions were redrawn as the population increased and more land was inhabited.
E-books and Books