Answer: Contiguity refers to the rule that electoral districts in a state be physically adjacent. A district is considered contiguous if all parts of the district are in physical contact with some other part of the district. Generally, a district is also considered contiguous if the district is split by a body of water, but there is a method of transport over the water, such as a bridge. A total of 49 states require that their state legislative districts to be contiguous, and 23 require congressional districts to be contiguous.[1]