Formal or informal associations of human beings, usually in pursuit of some common goal
- National Taxpayers Union - Nation's largest taxpayer group
- Nebraska Libertarian Party
- Nevada County Libertarian Party - California
- Nevada, Libertarian Party of
- New Hampshire, Libertarian Party of
- New Hampshire Liberty Alliance - New Hampshire non-partisan alliance to effect political and cultural change conducive to individual liberty
- New Jersey Libertarian Party
- New Mexico, Libertarian Party of
- New York, Libertarian Party of
- North Carolina, Libertarian Party of
- North Dakota, Libertarian Party of