North Sumatra I () is an electoral district in Indonesia. The electoral district encompasses of most of Greater Medan, which includes the regencies of Deli Serdang and Serdang Bedagai and two cities, Medan and Binjai.
Since its inception in 2004, this electoral district sent 10 members of the House of Representatives.
The following list is in alphabetical order. Party with the largest number of members is placed on top of the list.