oran kenneth gragson (february 14, 1911 – october 7, 2002) was an american businessman and politician. he was the longest-serving mayor of las vegas, nevada, from 1959 to 1975. gragson, a member of the republican party, was a small business owner who was elected mayor on a reform platform against police corruption and for equal opportunity for people of all socio-economic and racial categories. he is, as of 2018, the last republican mayor of the city.