It is the end of the year and property taxes are due by DEC 10th or it will be late.  I have some of the counties for northeren CA and for Fresno.  As I up date I will add more.

To pay them online, or view status, visit the sites below:

For Alameda:
http://www.acgov.org/propertytax.htm

For Alpine County:
http://www.alpinecountyca.gov/departments/treasurer

For Amador County:
http://www.co.amador.ca.us/depts/treasurer/

For Butte County:
http://ttc.buttecounty.net/Default.aspx?tabid=63

For Calaveras County:
http://www.co.calaveras.ca.us/cc/Departments/TaxCollector.aspx

For San Francisco County:
https://services.sfgov.org/ptx/intro.asp

For San Mateo:
http://www.sanmateocountytaxcollector.org/SMCWPS/pages/secureSearch.jsp

For Santa Clara:
http://payments.scctax.org/payment/jsp/currentSecured.jsp

For Contra Costa:
https://taxcolb.co.contra-costa.ca.us/taxpayment/main/

For Sacramento:
http://www.eproptax.saccounty.net/

For Fresno:
https://www2.co.fresno.ca.us/0410/fresnoproptax/

For the ones I have not found to pages to this is a good place to start you search