What is the city code for Sacramento, California?

The city code for Sacramento, California is indeed SMF. This code is derived from the first letters of the city's name, specifically using the airport's official name, Sacramento International Airport. Airport codes are standardized three-letter abbreviations used for easy identification, and they often reflect the city's name or the function of the airport.

In this case, SMF is widely recognized and used in travel itineraries, ticketing systems, and by airlines for communication regarding flights to and from Sacramento International Airport. The other options do not accurately represent Sacramento, as each corresponds to different locations or airports within California: OAK refers to Oakland International Airport, SAC is not an official IATA airport code, and SBP corresponds to San Luis Obispo County Regional Airport. This highlights the importance of understanding the specific codes assigned to each location for efficient travel planning and navigation.