One letter chapters

Alpha Chapter - 1911

Howard University Washington DC

Beta Chapter - 1914

Lincoln University Pennsylvania

Gamma Chapter - 1916

Boston Massachusetts city wide

Delta Chapter - 1919

Meharry Medical college, Nashville Tennessee

Epsilon Chapter - 1919

New York City, city wide 

Zeta Chapter - 1919

Virginia Union University, Richmond Virginia

Eta Chapter - 1919

Alcorn State University, Lorman Mississippi

Theta Chapter - 1922

Wiley College, Marshall Texas

Iota Chapter - 1923

University of Chicago (originally Atlantic City)

Kappa Chapter - 1920

Syracuse University-1922 (Originally West Virginia Negro Institute)

Lambda - 1923

USC, UCLA, CSU, in Los Angeles, California

Mu - 1920

University of Pennsylvania, Philadelphia, Pennyslvania

Nu - 1921

University Park Pennsylvania (Penn State), Pennsylvania

Xi - 1921

University of Minnesota, Minneapolis Minnesota

Omicron - 1921

Columbia University, NYC

Pi - 1923

Morgan State University, Baltimore Maryland

Rho - 1921

Johnson C. Smith University, Charlotte North Carolina

Sigma - 1920

Michigan State University, Lansing Michigan

Tau - 1922

Atlanta University, Atlanta Georgia

Upsilon - 1923

Wilberforce University, Wiberforce Ohio

Mighty Phi - 1921

University of Michigan, Ann Arbor Michigan

Chi - 1961

Edward Waters College, Jacksonville Florida

Psi - 1921

Morehouse College, Atlanta Georgia