Batak Karo

Sumatera Utara Province, Langkat, Deli Serdang, Karo, and Dairi regencies west and northwest of Lake Toba; south, small border area in Tapanuli Tengah regency; also in southern Aceh Province, small enclave in Aceh Tenggara regency; south, parts of Kota Subulussalam, Aceh Selatan, and Aceh Singli regencies.