MADDEN ZONE, a wealth of MADDEN family information can be found on the site by Peter and Shauna Madden of Lake Macquarie , New South Wales , Australia. There are several ways of accessing the information:
All Links page
Tipperary to Australia [NSW, QLD] Emigrant Index 1828-1865 [includes MADDENs]
Galway to Australia [NSW, QLD] Emigrant Index 1828-1854 [includes MADDENs]
Maddens to Australia - NSW and QLD [Pre-1880 BDM, Immigration, Convict and other data]
Maddens to Australia - TAS and VIC [Pre-1888 BDM, Immigration, Convict, Cemetery and other data]
Maddens to Australia - WA and SA [Pre-1880 BDM, Immigration, Convict, Cemetery and other data]
Maddens to USA [Pre-1880 Census, Marriages and other data]
Maddens Missing Persons USA [from Ireland]
Maddens of UK [Census 1841/1851]

The Descendants of John MADDEN and Bridget WHITTAKER of Ballinasloe, Co Galway, Ireland
This site by Ray and Sheila from Brisbane, Australia is not just another single family tree site. It has additional information and links to Madden name origins and surname history, a photo gallery of Madden people and places and detailed family genealogies/biographies.

Connors Genealogy-Ireland is a general site of Irish resources including civil and church, census records and land records, cemetery transcriptions, surname registries and photos and maps. It includes selected surname extractions.

Irish townlands are searchable via the excellent website

Michael Thompson has put together a useful finding aid listing nineteenth century Irish Registration Districts (aka Superintendent Registrar's Districts, originally Poor Law Unions), the sub-districts (aka Registrar's Districts, originally Dispensary Districts) they contain, and the Registration Districts adjacent to them, for use in researching civil registration records.

Printed Material

The Madan family and Maddens in Ireland and England; a historical account with notes and pedigrees of connections by marriage, Spanish branches and the Maddens, Falconer Madan, Printed for subscribers at the University press by J.Johnson Oxford 1930

History of the O'Maddens of Hy-Many, Gerard Madden, East Clare Heritage Tuamgraney, Co. Clare 2004

Genealogical, historical and family records of the O'Madden's of Hy-Many, and their descendants, T.M. Madden, W. Powell, printer Dublin 1894

The O'Maddens of Hy-Many. Some pages from the history of distinguished Irish family, Published for the proprietors by W.F. Dennehy, Dublin 1899