will add the records to its existing collection, which now totals more than 15m parish burial records and memorial inscriptions.
An additional 7m baptism, marriage and probate records will be made available online later this year.
The parish records collection brings together, in one central place, the disparate records from local parishes, which have been collated by local family history societies since 1911. It is co-ordinated by the Federation of Family History Societies.
The registers are seen as particularly valuable sources of information for people seeking to research their family tree back further than the civil records of birth, marriage and death, which began in 1837, and the 19th century censuses.
Elaine Collins, commercial director at Findmypast.com said: "The parish registers are a key resource for people looking to trace their family tree as far back as the early 16th century and will help open up new avenues of research for family historians across the country from the comfort of their own home.
"With another series of 'Who do you think you are?' due to air this year, family history is more popular than ever and the extension of historical records being made available to view online will help even more people find out more about their ancestors and family tree."
The data complements the records from the National Burial Index and the complete registration of death indexes (1837-2006), which are also available on the site.
Findmypast.com was acquired in December 2007 by Brightsolid, formerly Scotland Online, the company which won The National Archives' tender to publish the 1911 census online.