The list is the FIPS codes of Idaho counties. All the FIPS codes are starting with 16.
| County | FIPS Code |
| Ada | 16001 |
| Adams | 16003 |
| Bannock | 16005 |
| Bear Lake | 16007 |
| Benewah | 16009 |
| Bingham | 16011 |
| Blaine | 16013 |
| Boise | 16015 |
| Bonner | 16017 |
| Bonneville | 16019 |
| Boundary | 16021 |
| Butte | 16023 |
| Camas | 16025 |
| Canyon | 16027 |
| Caribou | 16029 |
| Cassia | 16031 |
| Clark | 16033 |
| Clearwater | 16035 |
| Custer | 16037 |
| Elmore | 16039 |
| Franklin | 16041 |
| Fremont | 16043 |
| Gem | 16045 |
| Gooding | 16047 |
| Idaho | 16049 |
| Jefferson | 16051 |
| Jerome | 16053 |
| Kootenai | 16055 |
| Latah | 16057 |
| Lemhi | 16059 |
| Lewis | 16061 |
| Lincoln | 16063 |
| Madison | 16065 |
| Minidoka | 16067 |
| Nez Perce | 16069 |
| Oneida | 16071 |
| Owyhee | 16073 |
| Payette | 16075 |
| Power | 16077 |
| Shoshone | 16079 |
| Teton | 16081 |
| Twin Falls | 16083 |
| Valley | 16085 |
| Washington | 16087 |
All codes are cited from United States Department of Agriculture [28].