The Google AdWords blog announced the addition of a new report in the reporting center, named the geographic performance report. The report will detail approximate Country, Region, Metro, and City data and give you data on a account, campaign, and ad group level.
The performance statistics available on these geographic reports include impressions, clicks, CTR, average CPC and cost. The report offers these attributes, Country/Territory, Region, Metro, City, Ad Distribution, Daily Budget, Ad Variation, Ad Group Status, Campaign Status and Ad Delivery Channel. Plus it can be broken out into Campaign or Ad Group level.
Here is a cropped snapshot of a sample report with some of this data:
More details can be found at the Google help section.