1.) The four gold circles represent both the Gold Rush and the four governments which have ruled San Francisco.

2.) The blue represents the San Francisco Bay.

3.) The international orange stripe represents the Golden Gate Bridge.

1.) Athena's owl represents Berkeley's commitment to education and wisdom.

2.) The blue and gold represent the University of California system (and Cal specifically.)

1.) The blue and orange stripes are drawn from the current city flag, though rearranged as a tribute to the city's Mexican heritage.

2.) The microprocessor highlights San Jose's role as the capital of Silicon Valley. As San Jose changed from an agricultural city to a high-tech city, the new flag replaces the laurels and bushels on the current one.

1.) The color scheme of blue and yellow is inspired by the Rosie the Riveter poster. (The city has now become home to a national park and museum dedicated to Rosie the Riveter.)

2.) The anchor references Richmond's proud naval history. During World War II, Richmond built more ships than any other US shipyard.

1.) Gilroy is the Garlic Capital of the World, so it was a no-brainer to put garlic at the center of the flag.

2.) The green signifies Gilroy's agricultural heritage and is the same shade of green used on the California flag.

1.) The golden circle in the middle represents the Sunnyvale sun (which is featured on the current Sunnyvale flag.)

2.) The green field represents Sunnyvale's agricultural past, while the white stripe represents El Camino Real.

3.) The hammer and pick are also a tribute to Sunnyvale's past. After the 1906 earthquake decimated San Francisco, Joshua Hendy Iron Works moved to Sunnyvale. The Iron Works built steam engines, naval guns, and rocket launchers during World War II. As Sunnyvale's first non-agricultural business, they paved the way for its current high-tech focus.

1.) As with San Jose, this flag includes a microprocessor to represent Santa Clara's status as part of Silicon Valley.

2.) The red of the microprocessor is taken from the current Santa Clara flag.

3.) The deep blue of the flag is one of Santa Clara's official primary colors.

1.) The rose is a reference to Saint Rose, Santa Rosa's namesake. (The current city logo also includes a rose as a focal point.)

2.) The light blue represents Santa Rosa Creek.

1.) Petaluma's status as the "Egg Capital of the World" is signified by the egg emblem in the center of the flag.

2) Petaluma is also known for its dairy industry. The flag's field is golden yellow in honor of that history and the "Butter and Egg Days" festival.

3) The blue represents the Petaluma River that runs through the old town.

1.) Colma's graveyards are represented by the calla lily. Funerals often use this flower to express sympathy.

2.) The red represents the residents of Colma who are still alive. As their motto says, "It's great to be alive in Colma."

1.) The green slopes represent the shores of the Carquinez Strait, which serves as the East Bay's gateway to Vallejo.

2.) The star highlights that Vallejo was formerly the capital of California.

3.) The blue and green color scheme is in line with Vallejo's current branding.

Fairfield's largest employer is Travis Air Force Base. It opened in 1942 so the flag is modeled on American planes' wing decals during World War II.

1.) The microprocessor symbolizes San Mateo's position in Silicon Valley. The city shares this symbol with San Jose and Santa Clara.

2.) The trees symbolize San Mateo's pride in its parks. Central Park and Coyote Point Park are among the city's 50 parks.

1.) The film reel represents the historic district of Niles, where California's film industry originated. The Tramp, the final film by Essanay Studios, introduced Charlie Chaplin's most iconic character.

2.) The mountains refer to Fremont's current city logo and represent Mission Peak, Mount Allison, and Monument Peak.

Concord's jazz history is reflected in the quarter note.

1.) Jazz legend Dave Brubeck was born in Concord.

2.) The Concord Jazz Festival is held in Concord annually.

3.) Concord Records (a jazz label whose artists have won 14 Grammy awards) was located here until 2002.

1) The anchor (and the flag's color scheme) come from the current Alameda flag and represent the city's proud naval history.

2.) The double stripes reflect the city's role in the First Transcontinental Railroad. The first train to arrive in the San Francisco Bay Area in 1869 arrived at the Alameda Terminal.

1.) The four yellow circles represent both the Gold Rush and the four names Hayward has been known by (the other three are Haywards, Haywards Station, and Haywood.)

2.) The light blue stripe down the middle represents San Lorenzo Creek, which runs through Hayward.

1.) Daly City is the "Gateway to the Peninsula" and its seal depicts a red brick gate. This resonance provided an obvious source of inspiration for the flag.

2.) The red and blue color scheme is inspired by the full-color seal's red brick and Daly City's wide open blue skies.

1.) The tricolor stripes honor the French heritage of the city's namesake, Gilbert du Motier, Marquis de Lafayette.

2.) The central circle contains the 13 colonies as represented on the "Betsy Ross Flag." This ties into the Marquis de Lafayette's central role in the American Revolution. Like its namesake, the Lafayette flag is a synthesis of the French and American revolutionary spirits.

1.) The gear in the middle of the flag represents South San Francisco's nickname as "The Industrial City."

2.) The gear's international orange color is a nod to both the Golden Gate Bridge and my redesign of San Francisco's flag.

3.) The arcs on the top and bottom of the flag reference both the Wind Harp sculpture and the double helix. The latter is referenced because of South City's new self-image as "The Birthplace of Biotechnology."

1.) The wave represents the marinas one can find all around Antioch as well as the public fishing pier.

2.) The "sun" also represents Antioch's historical copper reserves.

The Oakland flag is almost perfect as it is. Given that, all I had to do is remove the text and size up the tree.