The Webb family relocated from Chicago to the Northeast section of Denver in August 1954. He is a graduate of the city's Manual High School. Webb was an all-conference basketball player at Northeastern Junior College in Sterling, Colorado, in 1960. He obtained his B.A. in sociology from Colorado State College in 1964 and his M.A. in sociology from the same school, now known as the University of Northern Colorado, in 1971.
He is married to Wilma Webb, and they have four children.
Webb is the former president of the Democratic Mayors and the past president of the U.S. Conference of Mayors and National Conference of Black Mayors. He lectures frequently on civic issues and was a guest lecturer at Harvard University's Kennedy School of Government. Webb collaborates closely with his wife, former Colorado State Representative Wilma Webb.
Colorado Coalition Against Apartheid
The brochure was issued as part of a campaign to get the Public Employee Retirement Association (PERA) to divest from companies doing business in apartheid South Africa. The brochure says PERA Campaign endorsers are: Sisters of Loretto, Denver Peace & Justice Committee; Bishop Roy Sano, United Methodist Church; Free South Africa Committee, CU-Boulder; Weld County Rainbow Coalition; Colorado AFL-CIO; Bishop William Frey, Episcopal Diocese of Colorado; Rocky Mountain Peace Center; National Namibia Concerns; Amalgamated Transit Workers - Local1563; Church World Service/Crop; The Greater East Denver Ministerial Alliance; New Jewish Agenda; Regis Groff, State Senator; Pikes Peak Justice & Peace Commission, Colorado Springs; Bill Roberts, Denver City Councilman; Norman S. Early, Jr., Denver District Attorney; Mary DeGroot, Denver City Councilwoman; Colorado Muslim Society; Colorado National Lawyers Guild; Justice & Peace Office, Catholic Archdiocese of Denver; Ramona Martinez, Denver City Councilwoman; Urban League of Metropolitan Denver; Richard Castro; Women's International League for Peace & Freedom, Greeley; Colorado Peace Council;United Church of Christ, Rocky Mountain Conference; American Friends Service Committee; Students of Color, IILIFF School of Theology; American Federation of State, County, & Municipal Employees; Coalition of 100 Black Women; Patricia Schroeder, U.S. Congresswoman; Citizens Action for Peace, Grand Junction; Wellington Webb, Denver City Auditor; Wilma Webb, Colorado State Representative; and Akbarali Thobhani, Director, Institute for Intercultural Studies. 
Unity Reform Commission
In 2017 the Democratic National Committee's 21-member Unity Reform Commission included nine members selected by Hillary Clinton, seven members picked by Bernie Sanders, three picked by Thomas Perez, and the chair and vice chair ― selected by Clinton and Sanders, respectively.