Urban Fantasy
Urban fantasy is a genre where the story is largely set within an urban environment. This can be in the past, present or future as long as the story is set within a city.
It can be considered a polar opposite to High Fantasy, which is set in an entirely fictional world.
Noted Series
Jim Butcher's The Dresden Files
Mike Shevdon's The Courts of the Feyre
Ben Aaronovitch's Rivers of London