In 1,800 pages across 3 volumes, Worldmark Encyclopedia of Religious Practices provides information on current religious practices around the world with an emphasis on how religions impact the daily lives of their followers. Volume 1, Religions of the World, contains 20-to-25-page entries on 13 major religions, such as Christianity and Islam, and 3 to 5 page entries on 28 religious subgroups, such as Shi'ites or Baptists. Volumes 2 and 3 focus on the significant religions in 193 countries; entries range from 3-8 pages.

Using the standardised rubric format of the Worldmark series, the entries provide for easy access to information and encourage comparisons across different religions, religious groups, and countries.

Standardised rubrics for entries include:
* Date of Origin
* Dietary Practices
* Number of Followers
* Social Aspects
* History
* Political Impact (in country entries)
* Leaders
* Controversial Issues
* Major Theologians and Authors
* Cultural Impact
* Houses of Worship and Holy Places
* Other Religions (in country entries)
* What is Sacred?
* Rituals
* Rites of Passage
* Festivals and Holidays
* Membership
* Social Justice
* Modes of Dress
* Founder (in religion entries)
* Country Overview (in country entries)
* Religious Tolerance (in country entries)

Worldmark Encyclopedia of Religious Practices features more than 500 illustrations, including comparative tables, membership maps, drawings, and photographs; key-fact boxes; primary document excerpts and quotations; a glossary of terms; and a comprehensive subject and name index.