 Northward, the "quartiere" borders with "Quartiere" Tor di Quinto (Q. XVIII), separated from Parioli by the stretch of the Tiber between Ponte Milvio and the river Aniene, and with "Zona" Val Melaina (Z. I), whose border is defined by the stretch of the river Aniene between its immission in the Tiber and Ponte Salario.To the east, Parioli borders with "Quartiere" Trieste (Q. XVII), the boundary being marked by Via Salaria, between Ponte Salario and Viale Liegi.Southward, it borders with "Quartiere" Salario (Q. IV), whose border is marked by Viale Liegi and with "Quartiere" Pinciano (Q. III)