鎳是化學元素之一，化學符號為Ni，原子序數為28，具磁性,屬過渡金屬。
鎳由科朗斯達德(Axel Cronstedt)在1751年於瑞典發現。跟鈷一樣，鎳的外語名字(nickel)帶有迷信色彩，解作「小妖精」（可參考英文中魔鬼的別稱"Old Nick"）。nickel原為德文Kupfernickel（銅妖）的簡稱，鎳礦看似銅礦，卻無法冶煉出銅來，從前被看作是魔鬼搞的惡作劇。
鎳多用於鑄幣,首個純鎳幣於1881年出廠。
[編輯] 世界10大鎳生產國
年產量（千公噸）
| 國名 | 1977 | 1982 | 1987 | 1992 |
| 俄羅斯 | 144.3 | 165.2 | 272.0 | 215.0 |
| 加拿大 | 235.4 | 88.6 | 189.0 | 192.1 |
| 新喀里多尼亞 | 109.1 | 60.1 | 56.9 | 113.1 |
| 印尼 | 14.0 | 45.9 | 57.8 | 78.1 |
| 澳洲 | 85.8 | 87.6 | 74.6 | 64.0 |
| 中國 | - | 12.0 | 25.0 | 37.0 |
| 古巴 | 37.0 | 36.1 | 33.8 | 32.2 |
| 南非 | 23.0 | 22.0 | 34.3 | 28.4 |
| 多明尼加 | 24.2 | 5.4 | 32.5 | 25.0 |
| 波札那 | 12.1 | 17.8 | 25.9 | 23.5 |
| 十國小計 | 685.0 | 540.6 | 801.8 | 808.4 |
| 全球總計 | 772.8 | 621.6 | 892.5 | 921.9 |
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