William Anthony "Bill" Dotzler Jr. (born May 7, 1948) is the Iowa State Senator from the 31st District.

Dotzler was re-elected in 2006 with 11,782 votes (70%), defeating Republican opponent Jim Buschkamp.

[1] In 2007, Dotzler was instrumental in helping to pass tax incentives aimed at technology companies such as Google and Microsoft to build a facility in Iowa and invest millions of dollars in the state.

[2] Dotzler was re-elected in 2010 with 10,459 votes (59%), defeating Republican opponent Ron Welper.

[3] More recently, Dotzler has gone on record opposing the construction of new nuclear power plants in Iowa citing cost and safety concerns.