How many constitution members does Washington DC have?

thirteen members

The council is composed of thirteen members, each elected by district residents to a four-year term

Explanation:

The Government of the District of Columbia operates under Article One of the United States Constitution and the District of Columbia Home Rule Act, which devolves certain powers of the United States Congress to the Mayor and thirteen-member Council.

answer; eliminate parking problems in cities, because a car took up only half as much space as a horse and buggy;