He was a member of the
Pennsylvania State Senate for the
11th district from 1815 to 1819. From 1820 until his death he served as agent of the heirs of
William Penn for their interests in
Springettsbury Manor, the center of which is now the city of York. Barnitz was elected as an
Anti-Masonic candidate to the
Twenty-third Congress. He was not a candidate for reelection in
1834 to the
Twenty-fourth Congress. He resumed the practice of law at York and was also engaged in banking and served as president of the York Bank. He was member of the State constitutional convention in 1838 and a delegate to the Whig National Conventions at
Harrisburg, Pennsylvania, in
1840 and at
Baltimore, Maryland, in
1844. He died in York in 1850. Interment in the First Presbyterian Churchyard. ==Notes==