上海车牌号的第一个汉字代表车辆的所有者所在地，其中“沪”代表上海市。第二个字母代表车辆的类别：A代表公共出租汽车，B代表市区出租汽车，C代表市区出租汽车更新车，D代表出租小客车，E代表出租大客车，F代表出租载货汽车，G代表出租载货汽车更新车，H代表出租小客车，J代表市区个人号牌出租小客车，K代表市区个人号牌出租大客车，L代表市区个人号牌出租载货汽车，M代表市区个人号牌出租载货汽车更新车，N代表市区个人号牌出租小客车，P代表市区个人号牌出租小客车更新车，Q代表市区个人号牌出租大客车更新车，R代表市区个人号牌出租载货汽车更新车，S代表市区个人号牌出租小客车更新车，T代表市区个人号牌出租大客车更新车，U代表市区个人号牌出租载货汽车更新车，V代表市区个人号牌出租小客车更新车，W代表市区个人号牌出租大客车更新车，X代表市区个人号牌出租载货汽车更新车，Y代表市区个人号牌出租小客车更新车，Z代表市区个人号牌出租大客车更新车。