| Y | ||
| Yakutsk, Russia (YKS) | Yantai, China (YNT) | Yinchuan, China (INC) |
| Yalumet, Papua New Guinea (KYX) | Yaounde, Cameroon (YAO) | Yining, China (YIN) |
| Yam Island, QL, Australia (XMY) | Yap, Micronesia (YAP) | Yiwu, China (YIW) |
| Yamagata, Japan (GAJ) | Yaroslavl, Russia (IAR) | Yogyakarta, Indonesia (JOG) |
| Yan'an, China (ENY) | Yazd, Iran (AZD) | Yonago, Japan (YGJ) |
| Yanbu, Saudi Arabia (YNB) | Yelimane, Mali (EYL) | Yonaguni Jima, Japan (OGN) |
| Yancheng, China (YNZ) | Yeosu, South Korea (RSU) | Yorke Island, QL, Australia (OKR) |
| Yandina, Solomon Islands (XYA) | Yerevan, Armenia (EVN) | Yoronjima, Japan (RNJ) |
| Yangon, Myanmar (RGN) | Yibin, China (YBP) | Yulin, China (UYN) |
| Yanji, China (YNJ) | Yichang, China (YIH) | Yuzhno-Sakhalinsk, Russia (UUS) |