Sumner Peter Mills Jr. (August 26, 1911 – September 22, 2001) was an American attorney and politician from Maine.

[1] He is the father of Governor Janet Mills and State Senator Sumner Peter Mills III.

Mills was born on August 26, 1911, in Farmington, Maine, to Sumner Peter Mills and the former Flora Pearson.

He attended Hebron Academy, Colby College, and Boston University School of Law.