1W or 1-W may refer to:
- OR 1W; see Oregon Route 99W
- SSH 1W (WA); see Washington State Route 104
- Arkansas Highway 1W; see Arkansas Highway 1
- AH-1W, a model of Bell AH-1 Cobra
- AH-1W, a model of Bell AH-1 SuperCobra
- PB-1W, a model of Boeing B-17 Flying Fortress
- HR2S-1W, a model of Sikorsky CH-37 Mojave
- XS2U-1W, a model of Vought XS2U
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