The crossword solution for the term SAN ___ (SEAT OF MARIN COUNTY) is RAFAEL, a six-letter word. San Rafael is a city in Marin County, California, located in the North Bay region of the San Francisco Bay Area. It is the county seat of Marin County and is the fourth-largest city in the county. San Rafael is known for its Mediterranean climate, its vibrant downtown, and its many parks and trails.