An election to Northamptonshire County Council took place on 2 May 2013 as part of the 2013 United Kingdom local elections. Following a boundary review, the number of county councillors was reduced from 73 to 57 from this election. All members were elected by first-past-the-post voting from single-member electoral divisions for a four-year term of office. The Conservative Party held on to their overall majority, having held overall control of the council since 2005.

Northamptonshire County Council was the county council that governed the non-metropolitan county of Northamptonshire in England. It was originally formed in 1889 by the Local Government Act 1888, recreated in 1974 by the Local Government Act 1972 and abolished in 2021. The headquarters of the council was County Hall in Northampton.