Colby is a village and a civil parish in the English county of Norfolk. The village is 8.6 miles (13.8 km) south of Cromer, 16.8 miles (27.0 km) north-north-west of Norwich, 5.2 miles (8.4 km) west-north-west of North Walsham and 131 miles (211 km) north-east of London. The nearest railway station is at North Walsham Railway station where the Bittern Line from Cromer to Norwich can be accessed and the national rail network beyond. The nearest airport is Norwich International Airport. The village lies a small distance east from the A140 Cromer to Norwich road. The parish of Colby in the 2001 census, has a population of 524, including Banningham but reducing to 494 at the 2011 Census. For the purposes of local government, the parish falls within the district of North Norfolk.