How Many Kilometers Long Is Niger?

Niger is a country, not a linear feature—it has area, not length.

• Land area: 1,267,000 km² (489,000 mi²) – largest in West Africa, 22nd globally.
• Maximum north-south extent: ~1,400 km (870 mi).
• Maximum east-west extent: ~1,300 km (810 mi).
• Perimeter: ~5,800 km (borders: Libya, Chad, Nigeria, Benin, Burkina Faso, Mali, Algeria).

If you meant the Niger River: ~4,180 km (2,600 mi) long—West Africa's principal river, flowing Guinea → Mali → Niger → Benin/Nigeria → Gulf of Guinea.