 olive township elected officials township government  at the township level there are 5 republican elected officials supervisor earl t barks r 3600 e centerline st johns 9892246969 clerk sandra june r 1669 e alward road dewitt 5176689506 treasurer david l cook r 10408 bond rd dewitt 5176695082 trustee eric voisinet r 3252 e chadwick rd dewitt 5176698986 trustee gail watkins r 1869 e jason road st johns 9892240991 the next election for all township elected positions is in 2012 clinton county commissioners  olive township has one republican elected county commissioner district no 4 bengal riley  olive and watertown townships population 9425  jack enderle  r 5285 w howe road dewitt 48820 ph 517 6699355 term exps 12312010  