Bait-ul-Jaamay Mosque, located in Glen Ellyn, Illinois, serves the Ahmadiyya Muslim Community’s Chicago-area congregation. Ahmadiyya records list the mosque under the Chicago chapter, while its physical address is in Glen Ellyn. The mosque is used for congregational worship, religious education, youth and women’s programs, community gatherings, and interfaith outreach. Historical Ahmadiyya publications also record the opening of Bait-ul-Jaamay in Glen Ellyn and note that neighboring churches welcomed the mosque and its members, reflecting its longstanding role in local interfaith engagement.The mosque has hosted major community events, including Midwest Lajna and Nasirat gatherings, Ramadan programs, Quran education, youth spiritual-training camps, school visits, and interfaith activities.