This is a list of ethnic riots by country, and includes riots based on ethnic, sectarian, xenophobic, and racial conflict. Some of these riots can also be classified as pogroms.
Africa
Americas
United States
Nativist period: 1700s–1860
1824: Providence, RI – Hard Scrabble Riots
1829: Cincinnati, OH – Cincinnati riots of 1829
1831: Providence, RI - Hard Scrabble and Snow Town
1834: Ursuline Convent riots in Charlestown, Massachusetts – Convent burned to the ground
1834: Philadelphia, PA – pro-slavery riots
1834: New York, NY – New York City pro-slavery riots
1835: Boston, MA – pro-slavery riots
1835: Five Points Riot - "In June of the summer of 1835 occurred the Five Points riot, which grew out of the feeling between Americans and foreigners,"
1835: Washington, D.C. – Snow Riot
1836: Cincinnati, OH – Cincinnati riots of 1836
1841: Cincinnati, OH – Cincinnati riots of 1841 White Irish-descendant and Irish immigrant dock workers rioted against black dock workers.
1844: Philadelphia, PA – Philadelphia Nativist Riots
1851: Hoboken, NJ – anti-German riot
1855: Louisville, KY – "Bloody Monday" Protestant mobs attacked German and Irish immigrants.
Civil War period: 1861–1865
Reconstruction era: 1865–1877
1866: New Orleans massacre of 1866
1866: Memphis, Tennessee, mostly ethnic Irish against African Americans
1868: Pulaski Riot
1868: St. Bernard Parish massacre, St. Bernard Parish, Louisiana, whites against blacks
1868: Opelousas massacre, Opelousas, Louisiana, whites against blacks
1868: Camilla massacre, Camilla, Georgia, whites against blacks
1870: Eutaw massacre, Eutaw, Alabama, whites against blacks
1870: Laurens, South Carolina
1870: New York City Orange Riot
1871: Second New York City Orange Riot
1871: Los Angeles, Chinese massacre. Mixed Mexican and white mob killed 17–20 Chinese in the largest mass lynching in U.S. history
1871: Meridian race riot of 1871, Meridian, Mississippi, whites against African Americans
1891: New Orleans, lynchings of Italians and riot
1873: Colfax massacre, white Democrats against black Republicans
1874: New Orleans, Louisiana (Battle of Liberty Place) After contested gubernatorial election, Democrats took over state buildings for three days
1874: Coushatta massacre, Coushatta, Louisiana, white Democrats against black Republicans
1874–1875: Vicksburg massacre, Vicksburg, Mississippi
1875: Yazoo City, Mississippi
1875: Clinton, Mississippi
1876: Hamburg Massacre
1876: Ellenton riot, Ellenton, South Carolina
Jim Crow era: 1878–1914
1885: Rock Springs, WY – Anti-Chinese riot
1886: Seattle, WA – Seattle riot of 1886
1889: Forrest City, AR – 1889 Forrest City riot
1891: New Orleans, LA – March 14, 1891 New Orleans lynchings
1898: North Carolina – Wilmington massacre (white Democrats overthrew elected government and attacked blacks)
1898: Lake City, SC – Lynching of Frazier B. Baker and Julia Baker
1898: Greenwood County, SC – Phoenix election riot
1900: New Orleans, LA – Robert Charles riots
1900: Manhattan, NY – Tenderloin anti-black mob and police riot
1904: Springfield, OH – Springfield race riot of 1904
1906: Springfield, OH – Springfield race riot of 1906
1906: Atlanta, GA – Atlanta Massacre of 1906 (whites against African Americans)
1906: Brownsville, TX – Brownsville affair
1907: Onancock, VA – Two buildings owned by black residents were burned, black residents were ordered to leave town, and some people were injured by gunfire.
1907: San Francisco, CA and Bellingham, WA – Pacific Coast race riots of 1907 (anti-Asian)
1908: Springfield, IL – Springfield race riot of 1908
1909: Omaha, NE – Greek Town riot