| Name | What | Region | Country | Lat | Long | Elev ft. | Pop est |
|---|---|---|---|---|---|---|---|
| Yahata | city | Niigata | Japan | 37.99 | 138.34 | 3 | 9624 |
| Yahiko | city | Niigata | Japan | 37.70 | 138.83 | 98 | 23998 |
| Yama-igarashi | city | Niigata | Japan | 37.85 | 138.93 | 3 | 139514 |
| Yama-ikarashi | city | Niigata | Japan | 37.85 | 138.93 | 3 | 139514 |
| Yamada | city | Niigata | Japan | 37.87 | 139.02 | 3 | 166439 |
| Yamadera | city | Niigata | Japan | 36.94 | 137.91 | 1669 | 2986 |
| Yamadera | city | Niigata | Japan | 37.88 | 138.40 | 347 | 4413 |
| Yamaguchi | city | Niigata | Japan | 37.10 | 138.97 | 1220 | 11388 |
| Yamaguchi | city | Niigata | Japan | 37.30 | 138.56 | 200 | 19825 |
| Yamakoshi-higashitakezawa | city | Niigata | Japan | 37.31 | 138.91 | 830 | 11257 |
| Yamakoshi-mushigame | city | Niigata | Japan | 37.34 | 138.88 | 830 | 20495 |
| Yamakoshi-tanesuhara | city | Niigata | Japan | 37.35 | 138.93 | 1669 | 6477 |
| Yamakumada | city | Niigata | Japan | 38.46 | 139.67 | 866 | 2757 |
| Yamakumata | city | Niigata | Japan | 38.46 | 139.67 | 866 | 2757 |
| Yamamuro | city | Niigata | Japan | 37.27 | 138.64 | 291 | 9956 |
| Yamanobo | city | Niigata | Japan | 36.90 | 137.85 | 1669 | 3116 |
| Yamanoshita | city | Niigata | Japan | 37.94 | 139.07 | 26 | 137782 |
| Yamanoshitamachi | city | Niigata | Japan | 37.94 | 139.07 | 26 | 137782 |
| Yamauchi | city | Niigata | Japan | 37.87 | 139.41 | 295 | 12205 |
| Yamauji | city | Niigata | Japan | 37.87 | 139.41 | 295 | 12205 |
| Yamazaki | city | Niigata | Japan | 37.84 | 139.27 | 88 | 25646 |
| Yanagyūdo | city | Niigata | Japan | 38.20 | 139.63 | 1082 | 2113 |
| Yanagyūtō | city | Niigata | Japan | 38.20 | 139.63 | 1082 | 2113 |
| Yasuda | city | Niigata | Japan | 37.77 | 139.23 | 62 | 39257 |
| Yasuda | city | Niigata | Japan | 37.34 | 138.61 | 144 | 36950 |
| Yasuide | city | Niigata | Japan | 37.67 | 139.19 | 187 | 14158 |
| Yasuta | city | Niigata | Japan | 37.77 | 139.23 | 62 | 39257 |
| Yasutsuka | city | Niigata | Japan | 37.13 | 138.47 | 830 | 5864 |
| Yasuzuka | city | Niigata | Japan | 37.13 | 138.47 | 830 | 5864 |
| Yawata | city | Niigata | Japan | 37.99 | 138.34 | 3 | 9624 |
| Yazawa | city | Niigata | Japan | 37.69 | 139.37 | 830 | 2005 |
| Yazugawa | city | Niigata | Japan | 37.68 | 139.21 | 164 | 16430 |
| Yoita | city | Niigata | Japan | 37.55 | 138.81 | 49 | 37623 |
| Yoitamachi-yoita | city | Niigata | Japan | 37.55 | 138.81 | 49 | 37623 |
| Yokkaichi | city | Niigata | Japan | 38.24 | 139.50 | 95 | 33894 |
| Yokkamachi | city | Niigata | Japan | 37.98 | 138.35 | 78 | 9104 |
| Yokodo | city | Niigata | Japan | 37.78 | 138.95 | 3 | 59553 |
| Yokodoi | city | Niigata | Japan | 37.97 | 139.23 | 19 | 66869 |
| Yokogoshi | city | Niigata | Japan | 37.85 | 139.15 | 3 | 101466 |
| Yokogoshi-chuo | city | Niigata | Japan | 37.85 | 139.15 | 3 | 101466 |
| Yokone | city | Niigata | Japan | 37.37 | 139.07 | 1082 | 3254 |
| Yokone | city | Niigata | Japan | 36.95 | 138.63 | 2509 | 3907 |
| Yokoyama | city | Niigata | Japan | 38.07 | 138.38 | 282 | 10329 |
| Yomogihiramachi | city | Niigata | Japan | 37.36 | 138.90 | 1043 | 26567 |
| Yonekura | city | Niigata | Japan | 37.90 | 139.37 | 144 | 23598 |
| Yonezawa | city | Niigata | Japan | 37.25 | 139.01 | 830 | 13370 |
| Yonōzu | city | Niigata | Japan | 37.70 | 138.90 | 16 | 67935 |
| Yoshida | city | Niigata | Japan | 37.68 | 138.88 | 16 | 59388 |
| Yoshida-kasugacho | city | Niigata | Japan | 37.68 | 138.88 | 16 | 59388 |
| Yoshida-shinden | city | Niigata | Japan | 37.69 | 139.06 | 180 | 50268 |
| Yoshida-yamaya | city | Niigata | Japan | 37.15 | 138.73 | 830 | 34701 |
| Yoshii | city | Niigata | Japan | 38.05 | 138.40 | 164 | 9089 |
| Yoshio | city | Niigata | Japan | 37.31 | 138.48 | 984 | 14513 |
| Yoshiura | city | Niigata | Japan | 38.31 | 139.45 | 167 | 3886 |
| Yoshizato | city | Niigata | Japan | 37.05 | 138.84 | 830 | 14980 |
| Yotsugōya | city | Niigata | Japan | 37.85 | 138.89 | 101 | 97680 |
| Yotsukamachi | city | Niigata | Japan | 37.98 | 138.35 | 78 | 9104 |
| Yotsuya | city | Niigata | Japan | 37.68 | 138.96 | 16 | 89720 |
| Yotsuya | city | Niigata | Japan | 37.23 | 138.33 | 85 | 23947 |
| Yotsuyahama | city | Niigata | Japan | 37.23 | 138.33 | 85 | 23947 |
| Yukawachi | city | Niigata | Japan | 36.99 | 138.02 | 1669 | 3647 |
| Yunokami | city | Niigata | Japan | 37.81 | 138.22 | 180 | 3091 |
| Yunokawachi | city | Niigata | Japan | 36.99 | 138.02 | 1669 | 3647 |
| Yunokoti | city | Niigata | Japan | 36.99 | 138.02 | 1669 | 3647 |
| Yunokōchi | city | Niigata | Japan | 36.99 | 138.02 | 1669 | 3647 |
| Yusawa | city | Niigata | Japan | 36.94 | 138.81 | 1243 | 7403 |
| Yuzawa | city | Niigata | Japan | 36.94 | 138.81 | 1243 | 7403 |
| Yuzawa-machi | city | Niigata | Japan | 36.94 | 138.81 | 1243 | 7403 |
| Yōkaichi | city | Niigata | Japan | 38.19 | 139.44 | 22 | 21096 |