Schoonhoven (Dutch pronunciation:[ˈsxoːnˌɦoːvə(n)]) is a city and former municipality in the western Netherlands, in the province of South Holland. Since 2015 it has been a part of the municipality of Krimpenerwaard.

The former municipality had a population of 11,900 in 2014, and covered an area of 6.92 km (2.67 sq mi) of which 0.65 km (0.25 sq mi) water. From 2010 to 2014, it was the smallest municipality in the Netherlands in land area, following the merger of Rozenburg into Rotterdam.