🔗 There have almost been as many mass shootings in the US as days this year

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This is a list of mass shootings in the United States that have occurred in 2019. Mass shootings are incidents involving multiple victims of firearm-related violence. The precise inclusion criteria are disputed, and there is no broadly accepted definition.

Gun Violence Archive, a nonprofit research group that tracks shootings and their characteristics in the United States, defines a mass shooting as an incident in which four or more people, excluding the perpetrator(s), are shot in one location at roughly the same time. The Congressional Research Service narrows that definition, limiting it to "public mass shootings", and defined by four or more victims killed. It excludes counting wounded survivors. The Washington Post and Mother Jones use similar definitions, with the latter acknowledging that their definition "is a conservative measure of the problem", as shootings with fewer fatalities occur. The crowdsourced Mass Shooting Tracker project defines a mass shooting as "an incident where four or more people are shot in a single shooting spree. This may include the shooter themself, or police shootings of civilians around the shooter."

There were 434 mass shootings in 2019 that fit the inclusion criteria of this article. This averaged 1.19 mass shootings per day. In these shootings, 1,643 people were injured and 517 died, for a total of 2,160 victims.