Postal codes in Iiyama-shi, Nagano
長野県飯山市 — 30 postal codes. General code: 389-2200. Local government code 20213.
Address example
1-2-3 Asahi, Iiyama-shi, Nagano 389-2251, Japan
〒389-2251 長野県飯山市旭1-2-3
Replace 1-2-3 with the chome-ban-go (block and lot) number, and add the building and room number before it.
| Postal code | Town / English address |
|---|---|
| 389-2200 | (any other address in this municipality) （下に掲載がない場合） Iiyama-shi, Nagano 389-2200, Japan |
| 389-2251 | Asahi 旭 Asahi, Iiyama-shi, Nagano 389-2251, Japan |
| 389-2253 | Iiyama 飯山 Iiyama, Iiyama-shi, Nagano 389-2253, Japan |
| 389-2602 | Ichiyama 一山 Ichiyama, Iiyama-shi, Nagano 389-2602, Japan |
| 389-2415 | Oike 大池 Oike, Iiyama-shi, Nagano 389-2415, Japan |
| 389-2234 | Kijima 木島 Kijima, Iiyama-shi, Nagano 389-2234, Japan |
| 389-2252 | Kozawara 小佐原 Kozawara, Iiyama-shi, Nagano 389-2252, Japan |
| 389-2418 | Kotobuki 寿 Kotobuki, Iiyama-shi, Nagano 389-2418, Japan |
| 389-2235 | Sakai 坂井 Sakai, Iiyama-shi, Nagano 389-2235, Japan |
| 389-2255 | Shizuma 静間 Shizuma, Iiyama-shi, Nagano 389-2255, Japan |
| 389-2232 | Shimokijima 下木島 Shimokijima, Iiyama-shi, Nagano 389-2232, Japan |
| 389-2242 | Sonowata 其綿 Sonowata, Iiyama-shi, Nagano 389-2242, Japan |
| 389-2601 | Teruoka 照岡 Teruoka, Iiyama-shi, Nagano 389-2601, Japan |
| 389-2413 | Terusato 照里 Terusato, Iiyama-shi, Nagano 389-2413, Japan |
| 389-2231 | Tenshindo 天神堂 Tenshindo, Iiyama-shi, Nagano 389-2231, Japan |
| 389-2412 | Tokisato 常郷 Tokisato, Iiyama-shi, Nagano 389-2412, Japan |
| 389-2414 | Tokiwa 常盤 Tokiwa, Iiyama-shi, Nagano 389-2414, Japan |
| 389-2258 | Tomikura 富倉 Tomikura, Iiyama-shi, Nagano 389-2258, Japan |
| 389-2411 | Toyoda 豊田 Toyoda, Iiyama-shi, Nagano 389-2411, Japan |
| 389-2417 | Nakasone 中曽根 Nakasone, Iiyama-shi, Nagano 389-2417, Japan |
| 389-2233 | Nosakada 野坂田 Nosakada, Iiyama-shi, Nagano 389-2233, Japan |
| 389-2256 | Hachisu 蓮 Hachisu, Iiyama-shi, Nagano 389-2256, Japan |
| 389-2257 | Madaraokogen 斑尾高原 Madaraokogen, Iiyama-shi, Nagano 389-2257, Japan |
| 389-2322 | Mizuho 瑞穂 Mizuho, Iiyama-shi, Nagano 389-2322, Japan |
| 389-2321 | Mizuhotoyo 瑞穂豊 Mizuhotoyo, Iiyama-shi, Nagano 389-2321, Japan |
| 389-2416 | Midori 緑 Midori, Iiyama-shi, Nagano 389-2416, Japan |
| 389-2254 | Minamimachi 南町 Minamimachi, Iiyama-shi, Nagano 389-2254, Japan |
| 389-2244 | Yasuda 安田 Yasuda, Iiyama-shi, Nagano 389-2244, Japan |
| 389-2241 | Yamagishi 山岸 Yamagishi, Iiyama-shi, Nagano 389-2241, Japan |
| 389-2243 | Yoshi 吉 Yoshi, Iiyama-shi, Nagano 389-2243, Japan |
Source: Japan Post postal code data (UTF-8 edition, updated Aug 31, 2026) and romanized edition (KEN_ALL_ROME, June 2025). Japan Post does not claim copyright on postal code data and allows free redistribution. Romaji follows Japan Post (long vowels are not marked). * = romanized by this site from the kana reading because the town is not yet in the romanized edition.