This is a list of state highways in Bihar, India.
Bihar State has a good road network. There are 29
s (2015)with total length of {{convert|4195|km|mi|abbr=on}} and many state highways(2015) with total length of {{convert|4253|km|mi|abbr=on}}.
| State highway № | Route | Passes through - district(s) | Length (in km) |
|---|
| SH 1 | Sadikpur–Pavera–Masaurhi. | Patna | 38.22 |
| SH 2 | Bihta–Bikram–Paliganj–Arwal. | Patna | 37.70 |
| SH 4 | Fatuha-Daniawan-Hilsa-Ekangarsarai-Islampur-Hulasganj-Khizarsarai-Gaya. | Patna, Nalanda, Jehanabad, Gaya | 82.16 |
| SH 5 | Biharsharif-Parwalpur-Ekangarsarai-Telhara Road. Ekangarsarai-Jehanabad-Arwal Road. | Jehanabad, Arwal | 89.77 |
| SH 6 | Biharsharif-Barbigha-Shekhpura-Sikandara-Jamui-Kharagpur Road. | Jamui, Shekhpura, Lakhisarai | 95 |
| 7 | Gaya-Panchananpur-Daudnagar Road | Gaya | 35.2 |
| 8 | Nawada-Pakribarwan Road. | Nawada | 30.8 |
| 8 | Gaya-Manpur Town portion Road. | Gaya | 1.5 |
| 8 | Gaya-Nawada Road. | Nawada | 14.65 |
| 8 | Lakhisarai-Sikandara Road. | Lakhisarai | 24 |
| 11 | Aurangabad-Amba-Hariharganj Road | Aurangabad | 1.3 |
| 12 | Arrah-Sasaram Road. | Rohtas | 48.4 |
| 12 | Arrah-Sasaram Road. | Shahabad | 47 |
| 13 | New Bypass Road. | Buxar | 2 |
| 13 | Buxar-Chausa Road. | Buxar | 10 |
| 14 | Mohania-Ramgarh Road. | Bhabhua | 15 |
| 14 | Ramgarh-Chausa Road. | Bhabhua | 17 |
| 14 | Mohania-Bhabhua Road. | Bhabhua | 14.4 |
| 14 | Ramgarh-Chausa Road. | Buxar | 17 |
| 15 | Dehri-Nasriganj-Vikramganj Road. | Rohtas | 45 |
| 15 | Vikramganj-Dinara Road. | Rohtas | 20 |
| 16 | Dehri-Amjhore Road. | Rohtas | 38 |
| 16 | Akbarpur-Pipradih-Yadunathpur-Jardeg Road. | Rohtas | 67 |
| 17 | Sasaram-Chausa Road. | Buxar | 24 |
| 17 | Sasaram-Chausa Road. | Rohtas | 41 |
| 18 | Lakhisarai-Shekhpura Road. | Lakhisarai | 12.84 |
| 18 | Lakhisarai-Shekhpura Road. | Shekhpura | 9.5 |
| 18 | Lakhisarai-Jamui Road. | Lakhisarai | 13 |
| 18 | Sikandara-Jamui-Kharagpur Road. | Jamui | 58 |
| 18 | Jamui-Jhajha-Chakai Road. | Jamui | 63 |
| 18 | Sarwan-Chakai-Jasidih-Chopa Road. | Jamui | 20 |
| 18 | Lakhisarai-Jamui Road. | Jamui | 16 |
| 18 | Jamui ByPass Road. | Jamui | 1 |
| 19 | Bhagalpur-Hansdiha Road. | Bhagalpur | 16 |
| 19 | Bhagalpur-Hansdiha Road. | Banka | 51 |
| 22 | Sultanganj-Tarapur-Dardmara Road. | Munger | 34 |
| 22 | Sultanganj-Tarapur Road. | Bhagalpur | 6 |
| 22 | Sultanganj-Tarapur Road. | Banka | 58 |
| 23 | Bhagalpur Godda - Pirpainti Road. | Bhagalpur | 10 |
| 25 | Bhagalpur-Amarpur via Kajraili Road. | Banka | 32 |
| 25 | Bhagalpur-Amarpur via Kajraili Road. | Bhagalpur | 16 |
| 25 | Banka-Katoria Road. | Banka | 32 |
| 45 | Chapra-Siwan Road. | Saran | 0.9 |
| 45 | Harkhua-Khwajepur Road. | Gopalganj | 2.2 |
| 46 | Chapra-Rewaghat Road. | Saran | 3.5 |
| 46 | Muzaffarpur-Rewaghat Road. | Muzaffarpur | 3.9 |
| 47 | Siwan-Barharia-Sarfara Road. | Siwan | 18 |
| 47 | Siwan-Mairwa-Guthani Road. | Siwan | 36.25 |
| 47 | Siwan-Barharia-Sarfara Road. | Gopalganj | 17.25 |
| 48 | Muzaffarpur-Hajipur Road. | Vaishali | 1.8 |
| 48 | Muzaffarpur-Sitamarhi Road. | Muzaffarpur | 3.6 |
| 48 | Muzaffarpur-Hajipur Road. | Muzaffarpur | 4.1 |
| 49 | Mahua-Tajpur Road. | Vaishali | 23 |
| 49 | Mahua-Tajpur Road. | Samastipur | 8 |
| 49 | Hajipur-Mahua Road. | Vaishali | 21 |
| 49 | Samastipur-Tajpur Road. | Samastipur | 12 |
| 50 | Darbhanga (Laheria Sarai)-Samastipur Road. | Darbhanga | 16 |
| 50 | Hazma Chowk-Laheria Sarai-Kathalbari Road. | Darbhanga | 6.5 |
| 50 | Panda Sarai-Bela Mabbi Road. | Darbhanga | 0.75 |
| 50 | Samastipur-Musari-Gharari Road. | Samastipur | 9 |
| 50 | Darbhanga (Laheriasarai)-Samastipur Road. | Samastipur | 22 |
| 51 | Phulparas-Khutauna-Laukaha Road. | Madhubani | 32.7 |
| 52 | Rahika-Benipatti-Pupri Road. | Madhubani | 39.6 |
| 52 | Rahika-Madhubani Road. | Madhubani | 8 |
| 52 | Madhubani-Saurath-Pokhraini Road. | Madhubani | 2 |
| 52 | Madhubani-Rampatti-Jhanjharpur Road. | Madhubani | 22 |
| 52 | Sitamarhi-Pupri Road. | Sitamarhi | 26.42 |
| 53 | Chapra-Salempur Road. | Gopalganj | 10 |
| 54 | Bettiah-Govindganj Road. | West Champaran | 18 |
| 54 | Sitamarhi-Sheohar-Nasaurha- Belwaghat Road. | Sheohar | 13.64 |
| 54 | Motihari-Dhaka Road. | East Champaran | 3 |
| 54 | Motihari-Dhaka-Belwaghat Road. | East Champaran | 41.38 |
| 54 | Motihari-Madhubanighat Road. | East Champaran | 1.5 |
| 54 | Motihari-Turkaulia-Govindganj Road. | East Champaran | 35 |
| 54 | Bettiah-Govindganj-Turkaulia Road. | East Champaran | 17 |
| 55 | Sagi-Rosera Road. | Samastipur | 5 |
| 55 | Samastipur-Rosera Road. | Samastipur | 26 |
| 55 | Samastipur-Dalsinghsarai Road. | Samastipur | 5 |
| 55 | Begusarai-Manjhaul-Sagi Road. | Begusarai | 41 |
| 56 | Darbhanga-Bahera Road. | Darbhanga | 24 |
| 56 | Bahera-Biraul-Kusheshwar Asthan Road. | Darbhanga | 41.6 |
| 56 | Sakri-Bahera Road. | Darbhanga | 0.3 |
| 57 | Madhepura-Bazar Road. | Madhepura | 2.25 |
| 58 | Bihpur-Birpur Road | Khagaria | 3.5 |
| 58 | Chausa-Laualagam-Vijayghat Road. | Madhepura | 3.5 |
| 59 | Sonbarsa-Baijnathpur Road. | Saharsa | 24 |
| 60 | Purnea-Araria-Forbesganj Road. | Purnea | 19 |
| 60 | Araria Zero-Mile to Araria Gorhi Chowk Road. | Araria | 4.5 |
| 60 | Pothia to Subhash Chowk Forbesganj Road. | Araria | 11.5 |
| 60 | Jogbani to Bathnaha in Jogbani via Kala Balua Path. | Araria | 6.5 |
| 62 | Purnea-Katihar Road. | Katihar | 17 |
| 62 | Purnea-Katihar Road. | Purnea | 12 |
| 63 | Araria-Jokihat Road. | Araria | 16 |
| 63 | Thakurganj-Galgalia Road. | Kishanganj | 10.2 |
| 63 | Araria-Galgalia Road. | Kishanganj | 68 |
| 64 | Bagaha-Sadaho-Harnatand Road. | West Champaran | 7 |
| 64 | Bagaha-Triveni Road. | West Champaran | 38 |
| 64 | Bettiah-Bagaha Road. | West Champaran | 66 |
| 64 | Chapwa-Bettiah Road. | West Champaran | 25 |
| 65 | Rupauli-Tikapatti-Chandpur Road. | Purnea | 12 |
| 65 | Purnea-Dhamdaha-Rupauli Road. | Purnea | 48.7 |
| 65 | Rupauli-Tikapatti-Chandpur Road. | Katihar | 5 |
| 66 | Supaul-Singheshwar Asthan Road. | Supaul | 14 |
| 66 | Supaul Singheshwar Asthan Road. | Madhepura | 13.3 |
| 66 | Saharsa-Supaul Road. | Saharsa | 19 |
| 66 | Saharsa-Supaul Road. | Supaul | 15 |
| 67 | Kudra-Chenari Road. | Rohtas | 23 |
| 67 | Chenari-Shivsagar Road. | Rohtas | 20 |
| 68 | Sheoganj - Rafiganj - Goh - Upahara - Deokund- Baidarabad | 78[1] |
| 69 | Dumaria - Imamganj - Sherghati - Karmain - Mathurapur - Guraru - Ahiapur - Tekari - Mau - Kurtha - Kinjar -Paliganj - Rani Talab | 153 |
| 70 | Gaya - Fatehpur - Sirdalla - Rajauli | 58 |
| 71 | Jehanabad - Ghosi - Islampur - Rajgir - Giryak- Parwatipur | 85 |
| 72 | Jamui - Lakshmipur - Kharagpur - Bariyarpur | 58 |
| 73 | Siwan - Basantpur - Mashrak - Taraiya - Amnor - Sonho- Parsa - Shitalpur | 88 |
| 74 | Hajipur - Vaishali - Deoria - Sahebganj - Kesaria - Khajuriya - Areraj | 85 |
| 75 | Darbhanga - Kamtaul - Basaitha - Madhwapur | 47 |
| 76 | Araria - Raniganj - Jadia - Triveniganj - Pipra - Supaul - Vishnupur - Bhaptiyahi | 121 |
| 77 | Kursela - Pothia - Palka - Meergunj - Sarsi - Kalabalua - Raniganj - Saifganj - Farbesganj | 105 |
| 78 | Bihta - Naubatpur - Neva - Dumari - Beldarichak - Kansari - Daniawan & Chand - Noorsarai - Bhagan Bigaha -Rahui - Bind - Gopalbad - Sarmera | Patna,Nalanda | 112 |
| 78 | muzaffarpur-mahuwa roar 36 km viya- maniyari madarsa chok chainpur bangra muaffarpur |
1. ^http://bsrdcl.bih.nic.in/Projects.htm