Postal codes in Gumma Prefecture, Japan
Gumma (群馬県) has 35 municipalities in Japan Post's data. Choose a city, ward, town or village to see every postal code with the English address.
- Maebashi-shi 前橋市
- Takasaki-shi 高崎市
- Kiryu-shi 桐生市
- Isesaki-shi 伊勢崎市
- Ota-shi 太田市
- Numata-shi 沼田市
- Tatebayashi-shi 館林市
- Shibukawa-shi 渋川市
- Fujioka-shi 藤岡市
- Tomioka-shi 富岡市
- Annaka-shi 安中市
- Midori-shi みどり市
- Shinto-mura, Kitagumma-gun 北群馬郡榛東村
- Yoshioka-machi, Kitagumma-gun 北群馬郡吉岡町
- Ueno-mura, Tano-gun 多野郡上野村
- Ueno-mura, Tano-gun 多野郡神流町
- Shimonita-machi, Kanra-gun 甘楽郡下仁田町
- Nammoku-mura, Kanra-gun 甘楽郡南牧村
- Kanra-machi, Kanra-gun 甘楽郡甘楽町
- Nakanojo-machi, Agatsuma-gun 吾妻郡中之条町
- Naganohara-machi, Agatsuma-gun 吾妻郡長野原町
- Tsumagoi-mura, Agatsuma-gun 吾妻郡嬬恋村
- Kusatsu-machi, Agatsuma-gun 吾妻郡草津町
- Takayama-mura, Agatsuma-gun 吾妻郡高山村
- Higashiagatsuma-machi, Agatsuma-gun 吾妻郡東吾妻町
- Katashina-mura, Tone-gun 利根郡片品村
- Kawaba-mura, Tone-gun 利根郡川場村
- Showa-mura, Tone-gun 利根郡昭和村
- Minakami-machi, Tone-gun 利根郡みなかみ町
- Tamamura-machi, Sawa-gun 佐波郡玉村町
- Itakura-machi, Ora-gun 邑楽郡板倉町
- Meiwa-machi, Ora-gun 邑楽郡明和町
- Chiyoda-machi, Ora-gun 邑楽郡千代田町
- Chiyoda-machi, Ora-gun 邑楽郡大泉町
- Ora-machi, Ora-gun 邑楽郡邑楽町
Search all of Japan on the postal code lookup. Municipalities are listed in the order of Japan's local government codes; designated cities are split into wards (-ku).
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.