United States · 1619–1865

American Slavery:
An Interactive Historical Atlas

Mapping the geography, economy, and violence of American slavery across 246 years — state by state, decade by decade. Click any state. Toggle layers. Follow the timeline.

Enslaved Population Violence Index Economic Output Wealth Enrichment 1619–1865
American Slavery: An Interactive Historical Atlas · 1619–1865
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American Slavery: An Interactive Historical Atlas

Explore 246 years of slavery across all U.S. states — decade by decade. Tap below for the full interactive experience.

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246 years of documented data
U.S. Census · 1790–1860
All sources cited
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Scale of Harm

By the Numbers

4M
People Enslaved at Emancipation
Nearly 4 million people were held in slavery in the United States at the time of the 1860 Census — the last before emancipation.
$3.5B
Enslaved People as Property (1860)
The enslaved were listed as property on tax rolls, valued at $3.5 billion in 1860 dollars — more than all railroads and factories combined.
246yr
Years of Legal Slavery
From 1619 to 1865 — 246 years. The United States has existed as a free nation for less time than it existed as a slave nation.
57%
Peak Enslaved Population — Mississippi
By 1860, Mississippi's enslaved population reached 57% of the total state population — the highest concentration in the nation.
Then & Now

The Line from Slavery to Today

Redlining Followed Slave State Lines
HOLC's 1930s "Hazardous" grade zones overwhelmingly mapped onto the same communities that were majority-enslaved in the antebellum South — including Ward II in Lynchburg, VA.
Surveillance Targets Same Geographies
40% of Lynchburg's Flock LPR cameras sit in the highest-redlined tracts — areas whose concentration of Black residents traces directly to the plantation economy of the 1800s.
Wealth Gap Originates in Stolen Labor
The $42,580 income gap between Lynchburg's Ward II and Ward III does not begin in 1930 — it begins in 1619. Centuries of unpaid labor and denied wealth accumulation compound across generations.
Methodology

How This Atlas Was Built

This atlas draws on U.S. Census records from 1790 through 1860 to map the enslaved population by state and decade. The Violence Index aggregates documented slave patrols, recorded whippings and executions, slave market activity, family separations, fugitive slave enforcement actions, and recorded revolts by state.

The Economic Output layer maps cotton, tobacco, rice, and sugar production alongside the proportion of state economic output derived from enslaved labor. The Wealth Enrichment layer overlays the monetary value of enslaved people as property, export revenue contributions, and connections to banks, insurance companies, railroads, and shipping lines that profited from slavery.

"Slavery was not a regional aberration — it was the economic foundation of the entire nation."
U.S. Census Historical Records — 1790–1860
Enslaved population counts and percentages by state, every decade.
SlaveVoyages Database
Trans-Atlantic and Intra-American slave trade voyage records, Emory University.
LOC Slave Narratives / NMAHC
First-person accounts and archival records from the Library of Congress and National Museum of African American History and Culture.
American Panorama / Mapping Inequality
University of Richmond Digital Scholarship Lab — spatial history methodology.
Enslaved.org / Freedom on the Move
Linked datasets on enslaved individuals, runaway advertisements, and freedom petitions.