| Ouderkerk | |
| Settlement Type: | Former municipality |
| Flag Size: | 100x67px |
| Map Alt: | Highlighted position of Ouderkerk in a municipal map of South Holland |
| Coordinates: | 51.9333°N 42°W |
| Subdivision Type: | Country |
| Subdivision Name: | Netherlands |
| Subdivision Type1: | Province |
| Subdivision Name1: | South Holland |
| Subdivision Type2: | Municipality |
| Subdivision Name2: | Krimpenerwaard |
| Established Title: | Established |
| Established Date: | 1 January 1985 |
| Unit Pref: | Metric |
| Elevation Footnotes: | [1] |
| Elevation M: | 0 |
| Population Demonym: | Ouderkerker |
| Timezone1: | CET |
| Utc Offset1: | +1 |
| Timezone1 Dst: | CEST |
| Utc Offset1 Dst: | +2 |
| Postal Code Type: | Postcode |
| Postal Code: | 2830–2831, 2935 |
| Area Code Type: | Area code |
| Area Code: | 0180, 0182 |
Ouderkerk (pronounced as /nl/) is a 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 covered an area of NaNOuderkerk}} of which NaNOuderkerk}} was water. It was formed on 1 January 1985, after a municipal reorganization.
The former municipality of Ouderkerk consisted of the population centres Gouderak, Lageweg, Ouderkerk aan den IJssel, and IJssellaan, all situated along the Hollandse IJssel river.
Dutch Topographic map of the former municipality of Ouderkerk, 2013.