The following marriage records are available FREE online:

1769-1850 Early California Population Project - California Mission Vital Records

To obtain a copy of an official Marriage Certificate:

Monterey County Recorder's Office - 1905-current
Monterey County Genealogy Society - to locate and obtain official marriage records

Family History Library microfilm resources:

1893-1920 Marriage records - Monterey County Recorder
Find a Family History Center near you