| Binnenmaas | |
| Settlement Type: | Former municipality |
| Flag Size: | 100x67px |
| Map Alt: | Highlighted position of Binnenmaas in a municipal map of South Holland |
| Coordinates: | 51.8°N 37°W |
| Subdivision Type: | Country |
| Subdivision Name: | Netherlands |
| Subdivision Type1: | Province |
| Subdivision Name1: | South Holland |
| Subdivision Type2: | Municipality |
| Subdivision Name2: | Hoeksche Waard |
| Extinct Title: | Merged |
| Extinct Date: | 2019 |
| Unit Pref: | Metric |
| Elevation Footnotes: | [1] |
| Elevation M: | -1 |
| Timezone1: | CET |
| Utc Offset1: | +1 |
| Timezone1 Dst: | CEST |
| Utc Offset1 Dst: | +2 |
| Postal Code Type: | Postcode |
| Postal Code: | 3270–3274, 3295–3299 |
| Area Code Type: | Area code |
| Area Code: | 0186, 078 |
Binnenmaas (in Dutch; Flemish pronounced as /ˈbɪnə(n)maːs/) was a municipality in the western Netherlands, in the province of South Holland. The municipality had a population of in, and covers an area of NaNBinnenmaas}} of which NaNBinnenmaas}} is water. It is named after the lake of the same name.
The municipality was formed on 1 January 1984 by the merger of the municipalities Puttershoek, Maasdam, Mijnsheerenland, Westmaas, and Heinenoord. On 1 January 2007 the municipality 's-Gravendeel was added to Binnenmaas. On 1 January 2019 it was merged with Cromstrijen, Korendijk, Oud-Beijerland, and Strijen to form the municipality of Hoeksche Waard.[2]
The municipality of Binnenmaas consists of the following communities: Blaaksedijk, De Wacht, Goidschalxoord, 's-Gravendeel, Greup, Heinenoord, Kuipersveer, Maasdam, Maasdijk, Mijnsheerenland, Puttershoek, Reedijk, Schenkeldijk, Sint Anthoniepolder, Westdijk, Westmaas and Zwanegat.
Dutch Topographic map of the municipality of Binnenmaas, June 2015.