Machakos County is one of the 22 counties that failed to produce a single candidate in the 2019 KCPE national top 100 list. The best candidate in the County scored 432 marks out of a possible maximum of 500.
Here are the Machakos County top candidates and their schools in the 2019 KCPE exams:
| INDEXNO | NAME | GE | ENG | KIS | KSL | MAT | SCI | SSR | TOT | School_code | School_Name |
| 12330159001 | NJAU DAVID KIHU | M | 89A | 98A | = = | 85A | 79A- | 81A | 432 | 12330159 | ZAU SCHOOL |
| 12330216004 | MUMINA ASHLEY MUMO | F | 89A | 94A | = = | 85A | 76A- | 86A | 430 | 12330216 | KISC-KITENGELA INTERNATIONAL SCHOOL |
| 12330108006 | NDULA JASMINE NANDIKA | F | 86A | 95A | = = | 82A | 84A | 82A | 429 | 12330108 | LUKENYA ACADEMY |
| 12330216002 | WAMBUA IAN MUITHI | M | 86A | 94A | = = | 82A | 79A- | 84A | 425 | 12330216 | KISC-KITENGELA INTERNATIONAL SCHOOL |
| 12314245160 | KURIA VIOLET NJERI | F | 85A | 94A | = = | 83A | 80A | 83A | 425 | 12314245 | MAKUTANO A I C |
| 12301196003 | KASYULA FAITH KALONDU | F | 90A | 96A | = = | 85A | 74B+ | 80A | 425 | 12301196 | EARLYBIRD PRIMARY SCHOOL |
| 12330166001 | PIUS IRENE MUENI | F | 91A | 95A | = = | 82A | 77A- | 79A- | 424 | 12330166 | BENURU |
| 12330128018 | KIPKURUI ERNEST ROTICH | M | 89A | 91A | = = | 85A | 77A- | 82A | 424 | 12330128 | MT. SINAI C M I SCHOOL |
| 12330108095 | KATUI ENOCK MWENDWA | M | 83A | 94A | = = | 85A | 79A- | 83A | 424 | 12330108 | LUKENYA ACADEMY |
| 12330217003 | NAFULA FLORAH PATIENCE | F | 84A | 91A | = = | 85A | 79A- | 84A | 423 | 12330217 | WHITESTAR SPRINGS PRIMARY SCHOOL |
| 12330108018 | VUNGO KEITH VUNGO | M | 87A | 92A | = = | 85A | 76A- | 83A | 423 | 12330108 | LUKENYA ACADEMY |
| 12330121004 | ANGEL ALISON ATANDI | F | 87A | 91A | = = | 81A | 82A | 81A | 422 | 12330121 | KIUINI PREPARATORY |
| 12363123006 | KYALO GRACE KASENDI | F | 89A | 87A | = = | 85A | 79A- | 81A | 421 | 12363123 | ONE HILL’S ACADEMY |
| 12330229002 | KYALO MORRIS MUUO | M | 79A- | 96A | = = | 85A | 79A- | 82A | 421 | 12330229 | THE DANIEL SCHOOLS |
| 12330162031 | ONYANGO IVY EDNA | F | 78A- | 94A | = = | 85A | 82A | 82A | 421 | 12330162 | HILLSIDE SCHOOL UTAWALA |
| 12330162048 | KINYUA GODWILL MWANGI | M | 79A- | 93A | = = | 85A | 80A | 84A | 421 | 12330162 | HILLSIDE SCHOOL UTAWALA |
| 12330108047 | MONYANGI PETER ADAMS | M | 85A | 94A | = = | 83A | 77A- | 82A | 421 | 12330108 | LUKENYA ACADEMY |
| 12330108097 | OBINO REBECCA KEMUNTO | F | 83A | 94A | = = | 85A | 79A- | 80A | 421 | 12330108 | LUKENYA ACADEMY |
| 12330156010 | MAROLYNE MALESI AMBUNYA | F | 93A | 82A | = = | 85A | 76A- | 84A | 420 | 12330156 | CYMION JUNIOR ACADEMY |
| 12314245099 | MUSEMBI CHRIS NZUKI | M | 86A | 91A | = = | 83A | 79A- | 81A | 420 | 12314245 | MAKUTANO A I C |
| 12301110089 | MULI HOPE MUTANU | F | 85A | 95A | = = | 83A | 77A- | 80A | 420 | 12301110 | MACHAKOS PRIMARY |
| 12345204009 | MARTIN SHADRACK MUINDE | M | 85A | 94A | = = | 82A | 77A- | 81A | 419 | 12345204 | TALA S.A. |
| 12330217001 | MUTUNGA JOEL MUMO | M | 86A | 91A | = = | 83A | 77A- | 82A | 419 | 12330217 | WHITESTAR SPRINGS PRIMARY SCHOOL |
| 12330217004 | CHIAJI NICOLE ADHIAMBO | F | 89A | 94A | = = | 81A | 76A- | 79A- | 419 | 12330217 | WHITESTAR SPRINGS PRIMARY SCHOOL |
| 12330166004 | MUSILA FAITH MWONGELI | F | 90A | 86A | = = | 85A | 77A- | 81A | 419 | 12330166 | BENURU |
| 12330122002 | MUTISYA RECHAEL KAVINDU | F | 83A | 95A | = = | 82A | 82A | 77A- | 419 | 12330122 | STAR SHEIKH ACADEMY |
| 12314245014 | MERINYIEKI DANIEL CARLTON | M | 86A | 94A | = = | 83A | 77A- | 79A- | 419 | 12314245 | MAKUTANO A I C |
| 12330216001 | OKWIRI DOREEN ANYANGO | F | 87A | 89A | = = | 85A | 74B+ | 83A | 418 | 12330216 | KISC-KITENGELA INTERNATIONAL SCHOOL |
| 12330166002 | MULWA ARISTARCHUS KYENGO | M | 87A | 91A | = = | 83A | 77A- | 80A | 418 | 12330166 | BENURU |
| 12330122001 | DIDA DOYO BONAYA | M | 85A | 92A | = = | 82A | 84A | 75A- | 418 | 12330122 | STAR SHEIKH ACADEMY |
| 12330108032 | KARUBEE EMMA JEROTICH | F | 84A | 96A | = = | 85A | 72B+ | 81A | 418 | 12330108 | LUKENYA ACADEMY |