- O.W. Gurley
- Black businessman who bought land on Greenwood Avenue in 1906 and sold parcels to Black buyers, helping found the district.
- J.B. Stradford
- Born into slavery in Kentucky; became a lawyer and built the Stradford Hotel, widely described as the largest Black-owned hotel in America.
- A.J. Smitherman
- Founder and editor of the Tulsa Star (1913), Greenwood's watchdog and megaphone.
- Dr. A.C. Jackson
- Greenwood surgeon the Mayo brothers reportedly called the most able Black surgeon in America; killed in the massacre.
- Dick Rowland
- Nineteen-year-old Black shoeshiner whose arrest on May 31, 1921 set off the events that followed.
- Sarah Page
- The white elevator operator in the Drexel Building. The most widely accepted account is that Rowland tripped and grabbed her arm; she did not press charges.
- Buck Colbert Franklin
- Black lawyer who practiced from a tent after the massacre and won the court fight against the city's attempt to block rebuilding.
- Loula and John Williams
- Owners of the Dreamland Theatre and the Williams Confectionery on Greenwood Avenue.
- Booker T. Washington
- Educator often credited with coining the phrase "Black Wall Street," though the original source is unclear.
- Greenwood
- Tulsa's Black district, centered on Greenwood Avenue; by 1921 one of the most prosperous Black communities in America.
- Black Wall Street
- The nickname for Greenwood's thriving business district.
- Indian Territory
- The land, later Oklahoma, where the Five Tribes were forcibly relocated and where Black towns and Freedmen communities grew.
- The Five Tribes
- The Cherokee, Chickasaw, Choctaw, Creek (Muscogee) and Seminole nations.
- Freedmen
- Black people formerly enslaved by citizens of the Five Tribes, entitled by treaty to citizenship and land.
- Dreamland Theatre
- The Williams family's roughly 750-seat theater: silent films, live acts, and community pride.
- Stradford Hotel
- J.B. Stradford's three-story, 54-room hotel with a dining hall and saloon.
- Mount Zion Baptist Church
- Greenwood congregation that dedicated its new brick sanctuary in April 1921, weeks before it was burned.
- The Drexel Building
- The downtown Tulsa building where the May 30, 1921 elevator incident occurred.
- Greenwood Rising
- The history center in Tulsa today dedicated to Greenwood's story.
- The Tulsa Race Massacre
- May 31 to June 1, 1921: a white mob, many deputized and armed, looted and burned Greenwood, destroying some 35 blocks.
- Jim Crow
- The laws and customs that enforced racial segregation across the American South.
- Segregation
- The forced separation of Black and white people in public life; in Tulsa it pushed Black spending into Black-owned businesses.
- Lynching
- Killing by a mob, without a trial, used to terrorize Black communities.
- The Dawes Rolls
- The federal enrollment of the Five Tribes and Freedmen that turned tribal land into individual allotments.
- Allotment
- The breaking up of communally held tribal land into individual parcels, opening the rest to white settlement.
- Glenn Pool
- The great oil field south of Tulsa whose boom made the city rich.
- The Tulsa Star
- A.J. Smitherman's Black-owned newspaper, founded 1913; destroyed in the massacre.
- The Tulsa Tribune
- Tulsa's white afternoon paper, whose May 31, 1921 coverage inflamed the city; the editorial page is missing from archived copies.
- Red Summer
- 1919, when white mob violence against Black communities erupted in dozens of American cities.
- Martial law
- Military rule, declared in Tulsa on June 1, 1921 as the district burned.
- Deputized
- Given temporary police powers; hundreds of white men were deputized and armed during the massacre.
- Reparations
- Compensation for a wrong; survivors and descendants have sought it for a century.
- The Great Migration
- The movement of millions of Black Americans from the rural South to northern and western cities.
- The Ku Klux Klan
- The white supremacist organization that grew in Oklahoma in the years around the massacre.
- Moore v. Dempsey
- The 1923 Supreme Court case that overturned death sentences of Black men convicted after the Elaine massacre.