Board Thread:Questions and Answers/@comment-6119652-20130320192002/@comment-121.44.198.198-20130321000019

Interesting question, I'd say Lordaeron was larger than Stormwind at least while it was still a functioning nation.

Stormwind territories included: Stormwind, Elwynn Forest, Westfall, Redridge Mountains and Duskwood.

Lordaeron territories included: Lordaeron City, Tiristfal Glades (which included the Western Plaguelands), Silverpine Forest (half), Hillsbrad Foothills and Darrowmere Forest (Eastern Plaguelands).

So by itself Lordaeron was larger than Stormwind, now of course it's a bit different since the Argent Crusade control the majority of the Eastern and Western Plaguelands, although Lordaeron has control of Silverpine Forest and is making pushes toward controlling Arathi.