Indiana State Route 37 runs north-south through Marion County. Like all other numbered surface highways in Marion County, this one does not go past the Interstate 465 loop. It by-passes Indianapolis around the south and eastsides of the metro. IN St Rt 37 passes through the folloing town in Marion County. Indianapolis IN St Rt 37 is multi-plexed in Marion County. Interstate 74, at Indianapolis. Interstate 465, at Indianapolis.