大概实现一下省份城市二级联动：

<meta http-equiv="content-type" content="text/html;charset=utf-8">


<script src="jquery-2.1.4.min.js"></script>

省份：<select id="province" onchange="provinceChange(this);">
           <option value="">请选择</option>
      </select>
<br/>
城市：<select id="city">
          <option value="">请选择</option>
      </select>

<script> 
  $(function(){
	getProvince();
  });
  	function getProvince(){
		$.getJSON('./city.json',function(data){
			var provinces=data.provinces;
		      var html='<option value="">请选择</option>';
		      for(var i=0;i<provinces.length;i++){
		    	  html+='<option value="'+provinces[i].provinceName+'">'+provinces[i].provinceName+'</option>';
		      }
		      $('#province').html(html);
	    });
	}
	function provinceChange(_this){
		var province=$(_this).val();
		$.getJSON('./city.json',function(data){
			var provinces=data.provinces;
		      var html='<option value="">请选择</option>';
		      for(var i=0;i<provinces.length;i++){
		    	  var citys=provinces[i].citys;
		    	  if(province== provinces[i].provinceName){
		    		  for(var j=0;j<citys.length;j++){
		    			  html+='<option value="'+citys[j].citysName+'">'+citys[j].citysName+'</option>';  
		    		  }
		    	  }
		      }
		      $('#city').html(html);
	    });
	}
</script>

JSON数据：

{"provinces": [{"citys": [{"citysName": "北京市"}],"provinceName": "北京市"},{"citys": [{"citysName": "天津市"}],"provinceName": "天津市"}, {"citys": [{"citysName": "上海市"}],"provinceName": "上海市"},{"citys": [{"citysName": "重庆市"}],"provinceName": "重庆市"},{"citys": [{"citysName": "石家庄市"},{"citysName": "邯郸市"},{"citysName": "唐山市"},{"citysName": "保定市"},{"citysName": "秦皇岛市"},{"citysName": "邢台市"},{"citysName": "张家口市"},{"citysName": "承德市"},{"citysName": "沧州市"},{"citysName": "廊坊市"},{"citysName": "衡水市"}],"provinceName": "河北省"},{"citys": [{"citysName": "太原市"},{"citysName": "大同市"},{"citysName": "朔州市"},{"citysName": "阳泉市"},{"citysName": "长治市"},{"citysName": "晋城市"},{"citysName": "忻州市"},{"citysName": "吕梁市"},{"citysName": "晋中市"},{"citysName": "临汾市"},{"citysName": "运城市"}],"provinceName": "山西省"},{"citys": [{"citysName": "呼和浩特市"},{"citysName": "包头市"},{"citysName": "乌海市"},{"citysName": "赤峰市"},{"citysName": "呼伦贝尔市"},{"citysName": "通辽市"},{"citysName": "乌兰察布市"},{"citysName": "兴安盟"},{"citysName": "鄂尔多斯市"},{"citysName": "巴彦淖尔市"},{"citysName": "阿拉善盟"},{"citysName": "锡林郭勒盟"}],"provinceName": "内蒙古"},{"citys": [{"citysName": "沈阳市"},{"citysName": "大连市"},{"citysName": "鞍山市"},{"citysName": "抚顺市"},{"citysName": "本溪市"},{"citysName": "丹东市"},{"citysName": "锦州市"},{"citysName": "营口市"},{"citysName": "阜新市"},{"citysName": "辽阳市"},{"citysName": "盘锦市"},{"citysName": "铁岭市"},{"citysName": "朝阳市"},{"citysName": "葫芦岛市"}],"provinceName": "辽宁省"},{"citys": [{"citysName": "长春市"},{"citysName": "吉林市"},{"citysName": "四平市"},{"citysName": "辽源市"},{"citysName": "通化市"},{"citysName": "白山市"},{"citysName": "松原市"},{"citysName": "白城市"},{"citysName": "延边"}],"provinceName": "吉林省"},{"citys": [{"citysName": "哈尔滨市"},{"citysName": "齐齐哈尔市"},{"citysName": "鸡西市"},{"citysName": "鹤岗市"},{"citysName": "双鸭山市"},{"citysName": "大庆市"},{"citysName": "伊春市"},{"citysName": "佳木斯市"},{"citysName": "七台河市"},{"citysName": "牡丹江市"},{"citysName": "黑河市"},{"citysName": "绥化市"},{"citysName": "大兴安岭"}],"provinceName": "黑龙江省"},{"citys": [{"citysName": "南京市"},{"citysName": "无锡市"},{"citysName": "徐州市"},{"citysName": "常州市"},{"citysName": "苏州市"},{"citysName": "南通市"},{"citysName": "连云港市"},{"citysName": "淮安市"},{"citysName": "盐城市"},{"citysName": "扬州市"},{"citysName": "镇江市"},{"citysName": "泰州市"},{"citysName": "宿迁市"}],"provinceName": "江苏省"},{"citys": [{"citysName": "杭州市"},{"citysName": "宁波市"},{"citysName": "温州市"},{"citysName": "嘉兴市"},{"citysName": "湖州市"},{"citysName": "绍兴市"},{"citysName": "金华市"},{"citysName": "衢州市"},{"citysName": "舟山市"},{"citysName": "台州市"},{"citysName": "丽水市"}],"provinceName": "浙江省"},{"citys": [{"citysName": "合肥市"},{"citysName": "芜湖市"},{"citysName": "蚌埠市"},{"citysName": "淮南市"},{"citysName": "马鞍山市"},{"citysName": "淮北市"},{"citysName": "铜陵市"},{"citysName": "安庆市"},{"citysName": "黄山市"},{"citysName": "滁州市"},{"citysName": "阜阳市"},{"citysName": "宿州市"},{"citysName": "六安市"},{"citysName": "亳州市"},{"citysName": "池州市"},{"citysName": "宣城市"}],"provinceName": "安徽省"},{"citys": [{"citysName": "福州市"},{"citysName": "厦门市"},{"citysName": "莆田市"},{"citysName": "三明市"},{"citysName": "泉州市"},{"citysName": "漳州市"},{"citysName": "南平市"},{"citysName": "龙岩市"},{"citysName": "宁德市"}],"provinceName": "福建省"},{"citys": [{"citysName": "南昌市"},{"citysName": "景德镇市"},{"citysName": "萍乡市"},{"citysName": "九江市"},{"citysName": "新余市"},{"citysName": "鹰潭市"},{"citysName": "赣州市"},{"citysName": "吉安市"},{"citysName": "宜春市"},{"citysName": "抚州市"},{"citysName": "上饶市"}],"provinceName": "江西省"},{"citys": [{"citysName": "济南市"},{"citysName": "青岛市"},{"citysName": "淄博市"},{"citysName": "枣庄市"},{"citysName": "东营市"},{"citysName": "烟台市"},{"citysName": "潍坊市"},{"citysName": "济宁市"},{"citysName": "泰安市"},{"citysName": "威海市"},{"citysName": "日照市"},{"citysName": "临沂市"},{"citysName": "德州市"},{"citysName": "聊城市"},{"citysName": "滨州市"},{"citysName": "菏泽市"}],"provinceName": "山东省"},{"citys": [{"citysName": "郑州市"},{"citysName": "开封市"},{"citysName": "洛阳市"},{"citysName": "平顶山市"},{"citysName": "安阳市"},{"citysName": "鹤壁市"},{"citysName": "新乡市"},{"citysName": "焦作市"},{"citysName": "濮阳市"},{"citysName": "许昌市"},{"citysName": "漯河市"},{"citysName": "三门峡市"},{"citysName": "南阳市"},{"citysName": "商丘市"},{"citysName": "信阳市"},{"citysName": "周口市"},{"citysName": "驻马店市"},{"citysName": "济源市"}],"provinceName": "河南省"},{"citys": [{"citysName": "武汉市"},{"citysName": "黄石市"},{"citysName": "十堰市"},{"citysName": "宜昌市"},{"citysName": "襄阳市"},{"citysName": "鄂州市"},{"citysName": "荆门市"},{"citysName": "孝感市"},{"citysName": "荆州市"},{"citysName": "黄冈市"},{"citysName": "咸宁市"},{"citysName": "随州市"},{"citysName": "恩施"},{"citysName": "仙桃市"},{"citysName": "潜江市"},{"citysName": "天门市"},{"citysName": "神农架"}],"provinceName": "湖北省"},{"citys": [{"citysName": "长沙市"},{"citysName": "株洲市"},{"citysName": "湘潭市"},{"citysName": "衡阳市"},{"citysName": "邵阳市"},{"citysName": "岳阳市"},{"citysName": "常德市"},{"citysName": "张家界市"},{"citysName": "益阳市"},{"citysName": "郴州市"},{"citysName": "永州市"},{"citysName": "怀化市"},{"citysName": "娄底市"},{"citysName": "湘西"}],"provinceName": "湖南省"},{"citys": [{"citysName": "广州市"},{"citysName": "韶关市"},{"citysName": "深圳市"},{"citysName": "珠海市"},{"citysName": "汕头市"},{"citysName": "佛山市"},{"citysName": "江门市"},{"citysName": "湛江市"},{"citysName": "茂名市"},{"citysName": "肇庆市"},{"citysName": "惠州市"},{"citysName": "梅州市"},{"citysName": "汕尾市"},{"citysName": "河源市"},{"citysName": "阳江市"},{"citysName": "清远市"},{"citysName": "东莞市"},{"citysName": "中山市"},{"citysName": "潮州市"},{"citysName": "揭阳市"},{"citysName": "云浮市"}],"provinceName": "广东省"},{"citys": [{"citysName": "南宁市"},{"citysName": "柳州市"},{"citysName": "桂林市"},{"citysName": "梧州市"},{"citysName": "北海市"},{"citysName": "防城港市"},{"citysName": "钦州市"},{"citysName": "贵港市"},{"citysName": "玉林市"},{"citysName": "百色市"},{"citysName": "贺州市"},{"citysName": "河池市"},{"citysName": "来宾市"},{"citysName": "崇左市"}],"provinceName": "广西"},{"citys": [{"citysName": "海口市"},{"citysName": "三亚市"},{"citysName": "三沙市"},{"citysName": "儋州市"},{"citysName": "五指山市"},{"citysName": "琼海市"},{"citysName": "文昌市"},{"citysName": "万宁市"},{"citysName": "东方市"},{"citysName": "定安"},{"citysName": "屯昌"},{"citysName": "澄迈"},{"citysName": "临高"},{"citysName": "白沙"},{"citysName": "昌江"},{"citysName": "乐东"},{"citysName": "陵水"},{"citysName": "保亭"},{"citysName": "琼中"}],"provinceName": "海南省"},{"citys": [{"citysName": "成都市"},{"citysName": "自贡市"},{"citysName": "攀枝花市"},{"citysName": "泸州市"},{"citysName": "德阳市"},{"citysName": "绵阳市"},{"citysName": "广元市"},{"citysName": "遂宁市"},{"citysName": "内江市"},{"citysName": "乐山市"},{"citysName": "南充市"},{"citysName": "眉山市"},{"citysName": "宜宾市"},{"citysName": "广安市"},{"citysName": "达州市"},{"citysName": "雅安市"},{"citysName": "巴中市"},{"citysName": "资阳市"},{"citysName": "阿坝"},{"citysName": "甘孜"},{"citysName": "凉山"}],"provinceName": "四川省"},{"citys": [{"citysName": "贵阳市"},{"citysName": "六盘水市"},{"citysName": "遵义市"},{"citysName": "安顺市"},{"citysName": "毕节市"},{"citysName": "铜仁市"},{"citysName": "黔西南"},{"citysName": "黔东南"},{"citysName": "黔南"}],"provinceName": "贵州省"},{"citys": [{"citysName": "昆明市"},{"citysName": "曲靖市"},{"citysName": "玉溪市"},{"citysName": "保山市"},{"citysName": "昭通市"},{"citysName": "丽江市"},{"citysName": "普洱市"},{"citysName": "临沧市"},{"citysName": "楚雄"},{"citysName": "红河"},{"citysName": "文山"},{"citysName": "西双版纳"},{"citysName": "大理"},{"citysName": "德宏"},{"citysName": "怒江"},{"citysName": "迪庆"}],"provinceName": "云南省"},{"citys": [{"citysName": "西安市"},{"citysName": "铜川市"},{"citysName": "宝鸡市"},{"citysName": "咸阳市"},{"citysName": "渭南市"},{"citysName": "延安市"},{"citysName": "汉中市"},{"citysName": "榆林市"},{"citysName": "安康市"},{"citysName": "商洛市"}],"provinceName": "陕西省"},{"citys": [{"citysName": "兰州市"},{"citysName": "嘉峪关市"},{"citysName": "金昌市"},{"citysName": "白银市"},{"citysName": "天水市"},{"citysName": "武威市"},{"citysName": "张掖市"},{"citysName": "平凉市"},{"citysName": "酒泉市"},{"citysName": "庆阳市"},{"citysName": "定西市"},{"citysName": "陇南市"},{"citysName": "临夏"},{"citysName": "甘南"}],"provinceName": "甘肃省"},{"citys": [{"citysName": "西宁市"},{"citysName": "海东市"},{"citysName": "海北"},{"citysName": "黄南"},{"citysName": "海南"},{"citysName": "果洛"},{"citysName": "玉树"},{"citysName": "海西"}],"provinceName": "青海省"},{"citys": [{"citysName": "拉萨市"},{"citysName": "日喀则市"},{"citysName": "昌都市"},{"citysName": "林芝市"},{"citysName": "山南市"},{"citysName": "那曲市"},{"citysName": "阿里"}],"provinceName": "西藏"},{"citys": [{"citysName": "银川市"},{"citysName": "石嘴山市"},{"citysName": "吴忠市"},{"citysName": "固原市"},{"citysName": "中卫市"}],"provinceName": "宁夏"},   {"citys": [{"citysName": "乌鲁木齐市"},{"citysName": "克拉玛依市"},{"citysName": "吐鲁番市"},{"citysName": "哈密市"},{"citysName": "昌吉"},{"citysName": "博尔塔拉"},{"citysName": "巴音郭楞"},{"citysName": "阿克苏"},{"citysName": "克州"},{"citysName": "喀什"},{"citysName": "和田"},{"citysName": "伊犁"},{"citysName": "塔城"},{"citysName": "阿勒泰"},{"citysName": "石河子市"},{"citysName": "阿拉尔市"},{"citysName": "图木舒克市"},{"citysName": "五家渠市"},{"citysName": "北屯市"},{"citysName": "铁门关市"},{"citysName": "双河市"},{"citysName": "可克达拉市"},{"citysName": "昆玉市"},{"citysName": "胡杨河市"}],"provinceName": "新疆"},{"citys": [{"citysName": "香港"}],"provinceName": "香港"},{"citys": [{"citysName": "澳门"}],"provinceName": "澳门"},{"citys": [{"citysName": "台湾"}],"provinceName": "台湾"}]}

---

更多

可以看看github上的一个项目china_regions：https://github.com/wecatch/china_regions

最全最新中国省，市，地区 json 及 sql 数据，自动抓取国标 http://www.stats.gov.cn/tjsj/tjbz/tjyqhdmhcxhfdm/ 数据，并且自动生成 JavaScript es6 module 以及 sql 数据。

下面分享几个github上的关于省市区数据的项目：

https://github.com/uiwjs/province-city-china

https://uiwjs.github.io/province-city-china/

https://github.com/xiangyuecn/AreaCity-JsSpider-StatsGov

https://xiangyuecn.gitee.io/areacity-jsspider-statsgov/

https://github.com/modood/Administrative-divisions-of-China