Although no official membership figures are published, the Columbia Encyclopedia gives an estimated figure of 50, 000 Christadelphians, who are spread across approximately 120 countries ; there are established churches ( or ecclesias, as they are often called ) in many of those countries, along with isolated members.
Ingawa hakuna takwimu rasmi za uanachama zinazochapishwa, Encyclopedia ya Columbia inatoa makadirio ya idadi ya Wakristadelphians 50, 000, ambao wameenea katika takriban nchi 120; kuna makanisa yaliyoanzishwa (au eklesia, kama yanavyoitwa mara nyingi) katika nyingi ya nchi hizo, pamoja na washiriki waliojitenga.