"Kildare, a county of Ireland, province of Leinster, 37 m. long and 20 broad; bounded E by Dublin and Wicklow, W by King's county and Queen's county, N be E. Meath, and S by Catherlough, and containing 593 English acres, divided into 100 parishes. It sends 2 members to parliament. Principal rivers, the Liffey, Barrow, and Boyne. It is a very fertile county. Kildare is the capital, but the asssizes are held alternately at Athy and Naas. Pop 107,715."
[From The New London Gazetteer (1826)]
The Irish Ancestors website (subscription) has the following types of records: State Registration of Births, Marriages & Deaths, Census returns, Land records, Church records, Genealogical Office records, Gravestone inscriptions, Directories, Newspapers, Wills, Deeds, and Occupations.
The Fianna website's pages for County Kildare provide important addresses and extensive information about online and other genealogy resources.
Roots Ireland (subscription) "offers access to a unique database of more than 20 million Irish records". Its Kildare coverage includes Baptismal/Birth Records, Marriage Records, Burial/Death Records, Census Records, Gravestone Inscriptions, Griffith's Valuation (Free Access), and Census Substitutes.