The longest city name in the state of California is "Rancho Santa Margarita".
Some claim the longest name belongs to Los Angeles as "El Pueblo de Nuestra Senora la Reina de los Angeles de Poriuncula." That may have been the official name under Spanish rule. However, that is not the official name today.
California shares the longest border with Nevada. The capital of California is Sacramento.
Taumatawhakatangihangak oauauotamateaturipukaka pikimaungahoronukupokaiwhe nua kitanatahu(not actually the name of a city) the longest name of a city is probably Palmerston North or Tamakimakaurau
Sacramento. That is the capital of California which has the longest border with Nevada. Nevada's entire western border is with California.
California
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Thiruvananthapuram
longest city name is Menomonie Junction longest single word city name is Blanchardville
The state capital with the longest name in the United States is "Oklahoma City," which has 11 letters.
Massachusetts has 13 letters
washington court house
California
Jefferson City, Missouri (there's 13 letters)