Purpose– The purpose of this research-based philosophical piece is to present a progressive manifesto for public libraries in the 21st century to address gaps in embracing diversity in its holistic dimensions and representing such information in their strategic planning and web documentations.Design/methodology/approach– Content analysis of public library websites in the USA informed the development of a Strategic Diversity Manifesto that includes the “who”, the “what” and the “how” components to describe and discuss diversity-related matters in their strategic planning and web representations.Findings– The Strategic Diversity Manifesto provides a mechanism for individual public library agencies, in their localized context and environment, to strategically inquire, describe, discuss, reflect, analyze and translate into concretized actions their picture of diversity as grounded in the reality of their representative communities.Originality/value– The Strategic Diversity Manifesto presents a more a comprehensive and consolidated picture of diversity beyond isolated strategies seen in past efforts. It is a broader level of analysis and “picture painting” of the agency’s context, which may not be as detailed as compared to other modes of description, though as a result, it is more holistic instead of fragmentary. The aim is first and foremost to provide a basis for reflective thought and discussion.