Krishnagiri is well connected to various parts of India through several National Highways:
Krishnagiri–Ranipet (NH-46)
Pondicherry–Krishnagiri (NH-66)
Krishnagiri–Madanapalli (NH-219)
Varanasi–Kanyakumari via Krishnagiri (NH-7)
The National Highway from Hosur to Krishnagiri is currently undergoing expansion from four-lanes to six-lanes.
The new bus stand on the outskirts of the town is well connected by government buses and private carriers to Chennai, Bangalore, Coimbatore and other major cities and towns in Tamil Nadu, Karnataka, Andhra Pradesh, Kerala and Puducherry.
The nearest railway junction is Jolarpet (60 km) and the nearest railway station is Rayakottai (30 km). A proposal is before the central government -via Jolarpet-Hosur route to build a Railway station in Krishnagiri thus making it part of the Indian railway network. This is set to facilitate trade of textiles and fruits .As per new budget report, the proposed new line would take off from Jolarpet Junction, Tirupattur and pass through Kandili, Bargur, Krishnagiri and Shoolagiri a length of 104 km to join at Rayakottai. Another survey was conducted for a new rail link between Krishnagiri and Dharmapuri in 2004-05..
The nearest commercial airport is Bangalore International Airport (91 km) and Salem Airport (110 km). Hosur Airport a Private Licensed Airfield/Aerodrome operated by Taneja Aerospace & Aviation also exists in the district
