SF’s street naming chaos stems from layered Spanish, military, and political histories, producing pairs like Divisadero/Division and Mason/Masonic that reliably mislead locals and visitors.
Key Takeaways
Numbered avenues (Richmond/Sunset) and numbered streets (SoMa/Mission) never intersect but routinely misdirect navigation; 8th St. improbably crosses 15th St. in Mission Bay.
The Presidio and Treasure Island, as former military bases, developed independent street grids with names identical to SF proper, including two separate Montgomery Streets miles apart.
Francis St. and Francisco St. are literally the same name in English and Spanish, making them the most semantically identical pair on the list.
Geary St. and Geary Blvd. are one continuous road whose name changes at Van Ness Ave., confusing even residents who live on it.
Mason appears four times across SF and Treasure Island: two Mason Streets, one Mason Court, and Masonic Ave., with no geographic relationship.
