About LD10 Arizona’s 10th Legislative District is one of 30 in the state, located entirely in Pima County. As of 2018 there are 49 precincts in the district, with a total registered voter population of 117,650. LD 10's Website Party Registration in LD10:37.7% Democratic31.9% Republican30.4% Other Voter Resources Check Your Voter Registration Register To Vote Free Clinic To Restore Rights