Joseph Nganga Maregu (akaberekwa musi wa22 Mbudzi 1977) mutambi wemuKenya anomhanya madaro marefu anokwikwidza mumitambo yekumhanya mumugwagwa kubva pa10K kusvika kumarathon. Anokwikwidza mumigwagwa, akaita chimiro chimwe chete chenyika yose pa2008 IAAF World Half Marathon Championships
, vakatora nzvimbo yechipfumbamwe uye menduru yegoridhe nechikwata cheKenya.