| Official Name: | Nidau District |
| Native Name: | Amtsbezirk Nidau |
| Settlement Type: | District |
| Subdivision Type3: | Capital |
| Area Total Km2: | 88 |
| Population As Of: | 2007 |
| Population Total: | 40728 |
| Population Density Km2: | auto |
| Utc Offset: | +1 |
| Utc Offset Dst: | +2 |
| Blank Name Sec1: | Municipalities |
| Blank Info Sec1: | 25 |
Nidau District is one of the 26 administrative districts in the canton of Bern, Switzerland. Its capital, while having administrative power, was the municipality of Nidau.
From 1 January 2010, the district lost its administrative power while being replaced by the Biel/Bienne (administrative district), whose administrative centre is Biel/Bienne.
Since 2010, it remains therefore a fully recognised district under the law and the Constitution (Art.3 al.2) of the Canton of Berne.
Although the district is officially German speaking, a small French-speaking minority lives in the area. The district has an area of 113 km2 and consisted of 25 municipalities:
| Municipality | Population (Dec 2007)[1] | Area (km2) | |
|---|---|---|---|
| 1,656 | 2.1 | ||
| 1,371 | 3.8 | ||
| 3,962 | 5.0 | ||
| 421 | 3.0 | ||
| 343 | 3.4 | ||
| 418 | 1.8 | ||
| 264 | 3.5 | ||
| 3,747 | 1.9 | ||
| 648 | 4.6 | ||
| 507 | 1.8 | ||
| 404 | 2.3 | ||
| 841 | 2.2 | ||
| 6,652 | 1.5 | ||
| 2,620 | 4.0 | ||
| 3,206 | 2.5 | ||
| 1,839 | 5.6 | ||
| 452 | 2.1 | ||
| 623 | 4.1 | ||
| 2,642 | 2.7 | ||
| 1,303 | 3.6 | ||
| 2,523 | 4.4 | ||
| 309 | 3.3 | ||
| 818 | 9.1 | ||
| 890 | 7.0 | ||
| 2,269 | 2.8 |