| Official Name: | Agate, Nebraska |
| Settlement Type: | Unincorporated community |
| Pushpin Map: | Nebraska#USA |
| Subdivision Type: | Country |
| Subdivision Name: | United States |
| Subdivision Type1: | State |
| Subdivision Name1: | Nebraska |
| Subdivision Type2: | County |
| Subdivision Name2: | Sioux |
| Timezone: | Mountain (MST) |
| Utc Offset: | -7 |
| Timezone Dst: | MDT |
| Utc Offset Dst: | -6 |
| Elevation Ft: | 4439 |
| Coordinates: | 42.42°N -103.7939°W |
| Area Code: | 308 |
| Blank Name: | GNIS feature ID |
| Blank Info: | 834977 |
Agate is in Sioux County, Nebraska, United States. Agate is located on Nebraska Highway 29, 19miles south-southeast of Harrison. It is home to Agate Fossil Beds National Monument.
A post office was established at Agate in 1899, and remained in operation until it was discontinued in 1968.[1] Agate was named for James H. Cook's Agate Springs Ranch, which was in turn named for the agate deposits in the area.[2]
According to the Köppen Climate Classification system, Agate has a cool semi-arid climate, abbreviated BSk on climate maps.