Daniel S, I believe the closest that they have to a census is the Confession Rolls that were done by the Catholic Church. They have a few online at the CCA website.
http://www.culturacores.azores.gov.pt/ig/ Click on Parish Registers, then change the radio button to Rois/ Confessados. I'm only seeing ones for the council of Angra on Terceira. Cheri Mello -- To unsubscribe from this group, send email to azores+unsubscr...@googlegroups.com. Follow the confirmation directions when they arrive. For more options, such as changing to List, Digest, Abridged, or No Mail (vacation) mode, log into your Google account and visit this group at http://groups.google.com/group/Azores. Click in the blue area on the right that says "Join this group" and it will take you to "Edit my membership."