Science magazines
- Newell's Townsend's Shearwater
- Niangua Darter
- Nichol's Turk's Head Cactus
- Nicklin's Pearlymussel
- Nightingale Reed Warbler
- Nihoa Finch
- Nihoa Millerbird
- Nioi
- Nipomo Mesa Lupine
- Nogal
- Nohoanu
- Noonday Snail
- North Park Phacelia
- Northeastern Beach Tiger Beetle
- Northeastern Bulrush
- Northern Aplomado Falcon
- Northern Riffleshell
- Northern Right Whale
- Northern Swift Fox
- Northern Wild Monkshood