Graduate Theology

Edited by Gina A. Zurlo and Todd M. Johnson.
3rd edition.
Edinburgh : Edinburgh University Press, 2022.
Particularly good for demographic information on countries and denominations.

Edinburgh: Edinburgh University Press, 2017-2023.
Seven volumes, each on a different region of the world:
East and Southeast Asia,
Latin America and the Caribbean,
North Africa and West Asia,
North America,
Oceania,
South and Central Asia,
Sub-Saharan Africa.

Edited by Roger E. Hedlund.
New Delhi: Oxford University Press, 2012.

Edited by Nicholas Lossky and others.
2nd edition. Geneva: WCC Publications, 2003.
Articles on the ecumenical aspects of particular theological topics (e.g. grace), as well as articles on important persons and groups in ecumenical dialogue.
The online version is available on the Internet Archive, a trusted source, but one for which it is necessary to create a free account and login.
For print version locations, see the UofT Library Catalogue.