The SF City ID Card is a municipal identification card program operated by San Francisco, California for residents of the city-county, regardless of their immigration status. The cards also do not specify the person's gender, to assist transgender individuals who often have difficulty with identification documents.

The stated purpose of the photo ID card is "to streamline access to City programs and connect residents to local businesses." San Francisco is the largest city in the United States to issue municipal identification. The program is modeled after a similar program operating in New Haven, Connecticut since 2007.

According to the SF City ID Card website, users of the card can use it to:

Such cards are not accepted as licenses to drive or purchase alcohol or tobacco, nor are they recognized by federal or state law. Possession of these cards is not considered mandatory by the city government.

Applicants must submit proof of identity and city residency. Parents may obtain a card for a minor; there are separate cards for children 13 and under, and for anyone 14 years of age or older. A fee ranging from $5 to $15 is charged for the card.

An identity document (also called a piece of identification or ID, or colloquially as one's 'papers') is any document which may be used to verify aspects of a person's personal identity. If issued in the form of a small, mostly standard-sized card, it is usually called an identity card (IC). In some countries the possession of a government-produced identity card is compulsory while in others it may be voluntary. In countries which do not have formal identity documents, informal ones may in some circumstances be required.

In the absence of a formal identity document, some countries accept driving licences as the most effective method of proof of identity. Most countries accept passports as a form of identification.

Most countries have the rule that foreign citizens need to have their passport or occasionally a national identity card from their country available at any time if they do not have residence permit in the country.

Information present on the document or in a supporting database might include the bearer's full name, a portrait photo, age, birth date, address, an identification number, profession or rank, religion, ethnic or racial classification, restrictions, and citizenship status. New technologies could allow identity cards to contain biometric information, such as photographs, face, hand or iris measurements, or fingerprints. Electronic identity cards or e-IDs are already available in some territories such as Hong Kong, Malaysia, Estonia, Finland, Belgium, Portugal, Morocco and Spain.

Ken Block (born November 21, 1967, in Long Beach, California) is a professional rally driver with the Monster World Rally Team. Block is also one of the co-founders and recently appointed Chief Brand Officer of DC Shoes. Block has also competed in many action sports events including skateboarding, snowboarding, and motocross.

In 2005, Ken Block began his national rallying career with the Vermont SportsCar team. Vermont SportsCar prepared a 2005 Subaru WRX STi for Block to compete. His first event of the rallying season was Sno*Drift, where he ended up finishing seventh overall and fifth in the Group N class. During the 2005 season, Block had five top five finishes and placed third overall in the Group N class and fourth overall in the Rally America National Championship. At the end of his first rallying year, Ken Block had won the Rally America Rookie of the Year award.

In 2006, Ken Block along with his DC rally teammate Travis Pastrana signed a new sponsorship deal with Subaru. Through this deal with Subaru, the teammates became known as "Subaru Rally Team USA." With the new rally season, Block also got a brand new Vermont SportsCar prepped 2006 Subaru WRX STi. He competed in the first ever X Games rally event at X Games XII. In the competition, Block ended up finishing third to take the bronze. He went on to compete in the 2006 Rally America National Championship, where he finished second overall.