Nonpartisan democracy (also no-party democracy) is a system of representative government or organization such that universal and periodic elections take place without reference to political parties. Sometimes electioneering and even speaking about candidates may be discouraged, so as not to prejudice others' decisions or create a contentious atmosphere.

In many nations, the head of state is nonpartisan, even if the prime minister and parliament are chosen in partisan elections. Such heads of state are expected to remain neutral with regards to partisan politics. In a number of parliamentary or semi-presidential countries, some presidents are non-partisan, or receive cross-party support.

Nonpartisan systems may be de jure, meaning political parties are either outlawed entirely or legally prevented from participating in elections at certain levels of government, or de facto if no such laws exist and yet there are no political parties.

De facto nonpartisan systems are mostly situated in states and regions with small populations, such as in Micronesia, Tuvalu, and Palau, where organizing political parties is seen as unnecessary or impractical.

De jure nonpartisan systems exist in several Persian Gulf states, including Oman and Kuwait; the legislatures in these governments typically have advisory capacity only, as they may comment on laws proposed by the executive branch but are unable to create laws themselves. De jure nonpartisan national governments sometimes resemble one-party states, but governments of the latter type explicitly recognize a single political party of which all officials are required to be a member.

Unless there are legal restrictions on political parties, factions within nonpartisan governments may evolve into political parties. The United States initially did not have enfranchised political parties, but these evolved soon after independence.