| County Code | County Name | County Code | County Name | County Code | County Name |
|---|---|---|---|---|---|
| 001 | MOMBASA | 018 | NYANDARUA | 035 | KERICHO |
| 002 | KWALE | 019 | NYERI | 036 | BOMET |
| 003 | KILIFI | 020 | KIRINYAGA | 037 | KAKAMEGA |
| 004 | TANA RIVER | 021 | MURANGA | 038 | VIHIGA |
| 005 | LAMU | 022 | KIAMBU | 039 | BUNGOMA |
| 006 | TAITA TAVETA | 023 | TURKANA | 040 | BUSIA |
| 007 | GARISSA | 024 | WEST POKOT | 041 | SIAYA |
| 008 | WAJIR | 025 | SAMBURU | 042 | KISUMU |
| 009 | MANDERA | 026 | TRANS NZOIA | 043 | HOMABAY |
| 010 | MARSABIT | 027 | UASIN GISU | 044 | MIGORI |
| 011 | ISIOLO | 028 | ELGEYO MARAKWET | 045 | KISII |
| 012 | MERU | 029 | NANDI | 046 | NYAMIRA |
| 013 | THARAKA NITHI | 030 | BARINGO | 047 | NAIROBI |
| 014 | EMBU | 031 | LAIKIPIA | ||
| 015 | KITUI | 032 | NAKURU | ||
| 016 | MACHAKOS | 033 | NAROK | ||
| 017 | MAKUENI | 034 | KAJIADO | ||
