Updates

The status of Christianity in Mongolia, India, and South Korea was investigated in November 2018 when World Christian Database editor Todd Johnson, took a three-week trip to India, Mongolia, and South Korea to meet with church and mission leaders, scholars, and pastors. Along the way, he gained valuable insight to help update the demographic estimates in WCD and provide clearer portraits of these countries for the World Christian Encyclopedia , 3rd edition (due 2020).
(See photos from the research trip).

Xiongan, Chiang Rai, Wollongong, and Myrtle Beach are some of the 195 cities in 49 countries are included for the first time in the 2018 edition of the United Nations listing of cities with over 300,000 people.

They represent a combination of smaller cities growing to over 300,000 for the first time, or the boundaries of cities changing (some merging and some splitting).

Most of these cities have been given an initial estimate of the percentage Christian and the percentage of the largest religion, with the remainder to follow over time.

City definitions and population source: United Nations, Department of Economic and Social Affairs, Population Division (2018). World Urbanization Prospects: The 2018 Revision.

(WCD has also made substantial improvements to the denominational data in many countries over this present quarter: this includes adding new denominations and the latest published affiliation data, and also in many countries a streamlining of smaller or more obscure denominations so the main listing includes only denominations for which recent data is reliable, while maintaining the presence of those smaller denomination names by grouping them under "other" denominations.)