{"data":{"id":"us-ca/gov-23121","jurisdiction":"us-ca","citation":"GOV § 23121","heading":"","body":"The boundaries of Marin County are as follows:\nBeginning in the Pacific Ocean at the southwestern corner of Sonoma; thence southeasterly along the southern line of Sonoma, to the mouth of Petaluma Creek; thence to the common corner of Marin, Sonoma, Contra Costa, and Solano, in San Pablo Bay; thence southerly along the western boundary of Contra Costa, in the Bay of San Pablo, to the middle of the Straits of San Pablo; thence southerly, in a direct line, to Invincible Rock, in the Bay of San Francisco, near the entrance of the Straits of San Pablo; thence, in a direct line, to the northwestern point of Red Rock; thence southerly to the extreme southerly point of Angel Island; thence southwesterly to the extreme end of Point Cavallo at low-water mark; thence on the line of low-water mark along the northern shore of the bay to Point Bonita, and three miles into the Pacific Ocean, to the northwestern corner of San Francisco; thence northwesterly by ocean shore to the place of beginning.","path":["Government Code - GOV","TITLE 3. GOVERNMENT OF COUNTIES [23000. - 33205.]","DIVISION 1. COUNTIES GENERALLY [23000. - 23732.]","CHAPTER 2. Boundaries [23070. - 23296.]","ARTICLE 2. Boundaries of the Several Counties [23100. - 23158.]"],"source_url":"https://downloads.leginfo.legislature.ca.gov/pubinfo_2025.zip","current_through":"2026-09-13","vintage":"","retrieved_at":"2026-09-14T05:56:33Z","sha256":"dcc5c6a55968d9ccce9f36b145cf2c280b1fffb4dd21c022a15214f419182b96","source_id":"us-ca","stale":false,"prev":"us-ca/gov-23120","next":"us-ca/gov-23122"},"notice":"GroundRules: Original legal text. Not legal advice."}