| Decker | |
| Pushpin Map: | Canada Manitoba |
| Pushpin Map Caption: | Location of Decker in Manitoba |
| Subdivision Type: | Country |
| Subdivision Name: |  Canada |
| Subdivision Type1: | Province |
| Subdivision Type2: | Region |
| Subdivision Name2: | Westman Region |
| Subdivision Type3: | Census Division |
| Subdivision Name3: | No. 15 |
| Leader Title1: | Governing Body |
| Leader Name1: | Hamiota Municipality |
| Leader Title2: | MP |
| Leader Name2: | Robert Sopuck |
| Leader Title3: | MLA |
| Leader Name3: | Larry Maguire |
| Unit Pref: | Metric |
| Population As Of: | 2006 Census[1] |
| Timezone: | CST |
| Utc Offset: | −6 |
| Timezone Dst: | CDT |
| Utc Offset Dst: | −5 |
| Coordinates: | 50.27°N -100.7817°W |
| Postal Code Type: | Postal Code |
| Postal Code: | R0M 0K0 |
| Area Code: | 204 |
| Blank1 Name: | NTS Map |
| Blank1 Info: | 062K0& |
| Blank2 Name: | GNBC Code |
| Blank2 Info: | GAGGY |
Decker is an unincorporated community in southwestern Manitoba, Canada. It is located approximately 17 kilometers (10 miles) northwest of Hamiota, Manitoba[2] in the Hamiota Municipality.
The community formed around the Decker family homestead. They arrived there in 1881 and the Post Office opened for the area in 1884 as Arrowton, named for the nearby Arrow River. In 1912 the Post Office was moved to the Decker homestead on 18-15-24W. Nowadays, there is almost nothing left, save for a church, 3 houses and a few old unused shops.