Co. Cork Civil Parishes Map
Co. Cork (East) Roman Catholic Parishes Map
Co. Cork (NorthWest) Roman Catholic Parishes Map
Co. Cork (SouthWest) Roman Catholic Parishes Map
Co. Cork GENUKI
Co. Cork IGP
Mallow Heritage Centre (Cork NorthEast) (RootsIreland)
Skibbereen Heritage Centre (Cork West)
Cork City & County Archives
Cork Local Studies Library
Special Ingredients - Record Finding Aids
Co. Cork Church of Ireland Parish Record Finder
Co. & City of Cork Registry of Deeds Townland Indexes Timelines
Cork has lots of small parishes so it's probably always worth checking adjoining parishes for your ancestors too.
The Irish Ancestors maps do not seem to have anything that you can zoom in on for the Cork city parishes - does anyone know of a good online source for this? However, I did discover this page of Maps of Cork, ranging from 1545 up to the end of the Victorian period, so hopefully these will help you with approximate parish extents.
Cork City Council have also constructed a marvellous website dedicated to helping you both research your ancestors and learn more about the history of the county - check out Cork Past and Present for some excellent resources.
Cork County Library and Arts Service has also published an online guide for researching your ancestors in the county. The majority of the content does seem to be just guidance to using national resources, but the Roman Catholic parishes index is very clear - see Cork County Library Family History Booklet.
The Royal Irish Academy Historic Towns Atlas includes two towns in Co. Cork - Bandon and Youghal. Explore the history of the town and enjoy the maps.
John Hayes' Failte Romhat website also has some directories relating to both the city and county of Cork as follows;