The spelling Aldermarston is sometimes found. The massive church tower is 700 years old. The village has been cut in two by the busy Stratford to Oxford road. 
Parish Registers at Worcestershire Archives
International Genealogical Index (IGI)
|Parish Registers||Births / Christenings||1656-60; 1701-1877|
|Bishops' Transcripts||Births / Christenings||1611-1700 (70%)|
At BMSGH Reference Library 
Worcestershire Parish Registers Marriages Vol.1 - Kempsey 1690-1812, Alderminster 1641-1812, Offenham 1543-1812
At Warwickshirewickshire Record Office 
Christenings1651-1936 Marriages1651-1981 Burials1651-1937
At Shakespeare Birthplace Trust Records Office
Christenings1628-1812 Marriages1651-1812 Burials1650-1812
At Birmingham Central Library 
Marriages1613-1812 [PHIL 1]; Christenings & Burials 1611-1688
At Society of Genealogists  :
ALDERMINSTER : Marriages 1613-41, 1651-1812: Phillimore's parish register series, vol. 22 - Worcestershire, vol. 1 [CD-ROM] IN: Phillimore's parish register series, vol. 22 - Worcestershire, vol. 1 Published London : Phillimore & Co Ltd, 1901 Author Phillimore, W P W ed. Author Carter, W F ed.
ALDERMINSTER : Marriages(I) 1651-75: Boyd's marriage index [Typescript.] IN: Boyd's marriage index Published , 1925-55 Author Boyd, Percival ed. Acc. no. Boyd 3987 Source D: P Boyd. Location Marriage index shelves Shelf mark Boyd's marriage index shelves
Free Internet searches of baptism, marriage and burial records, transcribed from parish and non-conformist registers of the U.K., are available at: http://www.freereg.org.uk/cgi/Search.pl
FreeREG is a new project. The database currently contains a few million records only, so you should not expect to find all your ancestors in the database.
The coverage for this parish currently stands at: Marriages: 1613-1811
Further records may have become available since this posting
Monumental Inscriptions and Associated Documents
St Mary & the Holy Cross BMSGH Shop
ALDERMINSTER (St. Mary & the Holy Cross) : Monumental Inscriptions [Typescript.] Published Nd. Author Page, Pauline et al. (trans.) Edition Rev. edn Source D: Birmingham & Midland Society for Genealogy & Heraldry. Society of Genealogists 
ALDERMINSTER (St. Mary & the Holy Cross) : Monumental Inscriptions: Warwickshire monumental inscriptions, vol. 20 [Typescript.] Alderminster Women's Institute (trans.) Source D: Birmingham & Midland Society for Genealogy & Heraldry IN: Warwickshire monumental inscriptions, vol.20 Published 1989 Author Society of Genealogists 
All the censuses between 1841 and 1901 are now available on a number of fee-paying (Subscription or PayAsYouGo) sites including Ancestry.co.uk, FindMyPast.co.uk, thegenealogist.co.uk andgenesreunited.co.uk. The 1911 census is available in full or in part on some of these sites. We are unable to advise on the choice of site since researchers' personal preferences will be influenced by the content and search facilities offered by each site. Some sites offer a free trial.
Access to the library edition of Ancestry.co.uk is widely available at most record offices, including Worcestershire Archives, and some libraries. You are advised to book time on their computers before making a visit.
A free-to-view site is being developed at freecen.org.uk for the 1841, 1851, 1861, 1871 and 1891 censuses. Coverage of Worcestershire parishes is rather sparse at this time.
Census returns can usually be viewed at Church of Jesus Christ of Latter Day Saints' Family History Centres.
Some repositories offer census details on microform, disc or printed copy. These include:
1841 1901 Worcestershire Archives 
1851-91 Warwickshirewickshire Record Office 
1851 Birmingham Central Library
1851-1891 1901 Shakespeare Birthplace Trust Records Office
Warwickshire 1891 census returns: Stratford on Avon registration district RG 12/2476-2479 [Microfilm.] Published London Public Record Office 2003 Society of Genealogists
An extract from the Topographical Dictionary of England 1831 by Samuel Lewis:
ALDERMINSTER, a parish partly in the upper division of the hundred of OSWALDSLOW, but chiefly in the upper division of the hundred of PEHSHORE, being a detached portion of the county of WORCESTER, surrounded by Warwickshire, 5 miles (S. S. E.) from Stratford upon, Avon, containing 443 inhabitants. The living is a discharged vicarage, in the archdeaconry and diocese of Worcester, rated in the king's books at £7, endowed with £200 private benefaction, and £200 royal bounty, and in the patronage of the Crown. The church, dedicated to St. Mary, is a curious cruciform edifice, having a low tower; the nave is in the Norman style of architecture. A recently constructed rail-road, from Stratford upon Avon to Moreton in the Marsh, passes through the village.
Last Updated: 15/07/2013