Mass Shootings in the United States — Hybrid GVA + Mother Jones

This report shows the first years of a hybrid dataset combining:

• Mother Jones (MJ) public mass shootings with 4+ killed
• Gun Violence Archive (GVA) mass shootings with 4+ shot (inclusive)
• School shootings marked with ★

Sample State × Year Incident Table (1995–2025)

Year	State	MJ Count	GVA Count	School Shooting?
1995	NY	1
1995	MA	1
1998	PA	0
1998	MI	0
1999	CO	1		★ Columbine HS
2018	FL	1	323+	★ Parkland
2019	TX	1	434+
2020	Various	0	615+
2021	Various	0	690+
2022	TX	1	695+	★ Uvalde
2023	CA	0	600+
2024	IL	0	586+
2025*	RI	0	397+

*2025 data through Nov. 30 (GVA national totals). :contentReference[oaicite:2]{index=2}

National Trend: Mass Shootings (GVA Inclusive Definition)

2018 2019 2020 2021 2022 2023 2024 2025

323 434 615 690 695 600 586 397*

*Note: Trend uses GVA totals of mass shootings where 4+ people were shot.* :contentReference[oaicite:3]{index=3}

U.S. Map — Mass Shooting Density by State (Demonstration)

This placeholder static image represents relative densities based on known aggregated data (e.g., Statista notes California has highest total since 1982). :contentReference[oaicite:4]{index=4}

Replace this with dynamic shading once full raw data is loaded into your system.