| Senate Name | Dist.# | County | Party | Session # | Dates | Notes |
|---|
|
|
| Dachrodt, Jacob | 18 | Northampton | Dem | 107 | 1887-88 |
| Dachrodt, Jacob | 18 | Northampton | Dem | 108 | 1889-90 |
| Daix, Augustus F., Jr. | 7 | Philadelphia (Part) | Rep | 120 | 1913-14 |
| Daix, Augustus F., Jr. | 7 | Philadelphia (Part) | Rep | 121 | 1915-16 |
| Daix, Augustus F., Jr. | 7 | Philadelphia (Part) | Rep | 122 | 1917-18 |
| Daix, Augustus F., Jr. | 7 | Philadelphia (Part) | Rep | 123 | 1919-20 |
| Daix, Augustus F., Jr. | 7 | Philadelphia (Part) | Rep | 124 | 1921-22 |
| Daix, Augustus F., Jr. | 7 | Philadelphia (Part) | Rep | 125 | 1923-24 |
| Daix, Augustus F., Jr. | 7 | Philadelphia (Part) | Rep | 126 | 1925-26 |
| Daix, Augustus F., Jr. | 7 | Philadelphia (Part) | Rep | 127 | 1927-28 |
| Daix, Augustus F., Jr. | 7 | Philadelphia (Part) | Rep | 128 | 1929-30 |
| Daix, Augustus F., Jr. | 7 | Philadelphia (Part) | Rep | 129 | 1931-32 |
| Dale, Samuel | | Northumberland, Luzerne, Mifflin | Rep | 20 | 1795-96 |
| Dale, Samuel | | Northumberland, Luzerne, Mifflin | Rep | 21 | 1796-97 |
| Dale, Samuel | | Northumberland, Luzerne, Mifflin | Rep | 22 | 1797-98 |
| Dale, Samuel | | Northumberland, Luzerne, Mifflin | Rep | 23 | 1798-99 |
| Dale, Samuel | | Northumberland, Luzerne, Mifflin | Rep | 24 | 1799-1800 |
| Dando, Joseph P. | 29 | Schuylkill | Dem | 132 | 1937-38 |
| Dando, Joseph P. | 29 | Schuylkill | Dem | 133 | 1939-40 |
| Danner, Thomas D. | 18 | Northampton | Dem | 115 | 1903-04 |
| Danner, Thomas D. | 18 | Northampton | Dem | 116 | 1905-06 |
| Darlington, Edward C. | 7 | Lancaster, Lebanon | Whig | 76 | 1852 |
| Darlington, Edward C. | 7 | Lancaster, Lebanon | Whig | 77 | 1853 |
| Darlington, Edward C. | 7 | Lancaster, Lebanon | Whig | 78 | 1854 |
| Darragh, Cornelius | 21 | Allegheny | AM | 60 | 1835-36 |
| Darragh, Cornelius | 21 | Allegheny | AM | 61 | 1836-37 |
| Darragh, Cornelius | 19 | Allegheny | Whig | 62 | 1837-38 |
| Darragh, Robert | 25 | Beaver, Mercer | Whig | 69 | 1845 |
| Darragh, Robert | 25 | Beaver, Mercer | Whig | 70 | 1846 |
| Darragh, Robert | 25 | Beaver, Mercer | Whig | 71 | 1847 |
| Darsie, George | 19 | Allegheny, Butler | Whig | 66 | 1842 |
| Darsie, George | 19 | Allegheny, Butler | Whig | 67 | 1843 |
| Darsie, George | 24 | Allegheny, Butler | Whig | 68 | 1844 |
| Darsie, George | 24 | Allegheny, Butler | Whig | 69 | 1845 |
| Darsie, George | 24 | Allegheny/Butler | Whig | 70 | 1846 |
| Darsie, George | 24 | Allegheny/Butler | Whig | 71 | 1847 |
| Darsie, George | 24 | Allegheny/Butler | Whig | 72 | 1848 |
| Darsie, George | 24 | Allegheny/Butler | Whig | 73 | 1849 |
| Darsie, George | 24 | Allegheny/Butler | Whig | 74 | 1850 |
| Darsie, George | 22 | Allegheny | Whig | 77 | 1853 |
| Darsie, George | 22 | Allegheny | Whig | 78 | 1854 |
| Darsie, George | 22 | Allegheny | Whig | 79 | 1855 |
| Davidson, William | 17 | Fayette | Dem | 43 | 1818-19 |
| Davidson, William | 17 | Fayette | Dem | 44 | 1819-20 |
| Davidson, William | 17 | Fayette | Dem | 45 | 1820-21 |
| Davidson, William | 17 | Fayette | Dem | 46 | 1821-22 |
| Davies, William T. | 23 | Bradford, Wyoming | Rep | 101 | 1877 |
| Davies, William T. | 23 | Bradford, Wyoming | Rep | 102 | 1878 |
| Davies, William T. | 23 | Bradford, Wyoming | Rep | 103 | 1879-80 |
| Davies, William T. | 23 | Bradford, Wyoming | Rep | 104 | 1881-82 |
| Davies, William T. | 23 | Bradford, Wyoming | Rep | 105 | 1883-84 |
| Davis, Albert | 22 | Lackawanna | Rep | 123 | 1919-20 |
| Davis, Albert | 22 | Lackawanna | Rep | 124 | 1921-22 |
| Davis, Albert | 22 | Lackawanna | Rep | 125 | 1923-24 |
| Davis, Albert | 22 | Lackawanna | Rep | 126 | 1925-26 |
| Davis, Albert | 22 | Lackawanna | Rep | 127 | 1927-28 |
| Davis, Albert | 22 | Lackawanna | Rep | 128 | 1929-30 |
| Davis, Elisha W. | 2 | Philadelphia (Part) | Rep | 96 | 1872 |
| Davis, Elisha W. | 2 | Philadelphia (Part) | Rep | 97 | 1873 |
| Davis, Elisha W. | 2 | Philadelphia (Part) | Rep | 98 | 1874 |
| Davis, Elisha W. | 5 | Philadelphia (Part) | Rep | 99 | 1875 |
| Davis, Elisha W. | 5 | Philadelphia (Part) | Rep | 100 | 1876 |
| Davis, J. De Puy | 8 | Berks | Dem | 91 | 1867 |
| Davis, J. De Puy | 8 | Berks | Dem | 92 | 1868 |
| Davis, J. De Puy | 8 | Berks | Dem | 93 | 1869 |
| Davis, J. De Puy | 8 | Berks | Dem | 94 | 1870 |
| Davis, J. De Puy | 8 | Berks | Dem | 95 | 1871 |
| Davis, J. De Puy | 8 | Berks | Dem | 96 | 1872 |
| Davis, J. De Puy | 8 | Berks | Dem | 97 | 1873 |
| Davis, Preston B. | 27 | Snyder, Northumberland, Union | Rep | 149-50 | 1965-66 |
| Davis, Preston B. | 27 | Snyder, Montour, Union | Rep | 151-2 | 1967-68 |
| Davis, Preston B. | 27 | Snyder, Montour, Union | Rep | 153-4 | 1969-70 |
| Davis, Preston B. | 27 | Snyder, Montour, Union | Rep | 155-6 | 1971-72 |
| Davis, Preston B. | 27 | Snyder, Northumberland, Union | Rep | 147-8 | 1963-64 |
| Davis, William H. | 21 | Luzerne (Part) | Dem | 141 | 1955-56 |
| Dawida, Michael M. | 43 | Allegheny (Part) | Dem | 173-4 | 1989-90 |
| Dawida, Michael M. | 43 | Allegheny (Part) | Dem | 175-6 | 1991-92 |
| Dawida, Michael M. | 43 | Allegheny (Part) | Dem | 177-8 | 1993-94 |
| Dawida, Michael M. | 43 | Allegheny (Part) | Dem | 179-80 | 1995-96 |
| Dechert, Robert P. | 1 | Philadelphia (Part) | Dem | 95 | 1871 |
| Dechert, Robert P. | 1 | Philadelphia (Part) | Dem | 96 | 1872 |
| Deitrick, George A. | 27 | Snyder, Northumberland, Union | Rep | 132 | 1937-38 |
| Deitrick, George A. | 27 | Snyder, Northumberland, Union | Rep | 133 | 1939-40 |
| Deitrick, George A. | 27 | Snyder, Northumberland, Union | Rep | 134 | 1941-42 |
| Deitrick, George A. | 27 | Snyder, Northumberland, Union | Rep | 135 | 1943-44 |
| Delamater, George B. | 29 | Crawford, Erie | Rep | 95 | 1871 |
| Delamater, George B. | 29 | Crawford | Rep | 96 | 1872 |
| Delamater, George B. | 29 | Crawford | Rep | 97 | 1873 |
| Delamater, George W. | 50 | Crawford | Rep | 107 | 1887-88 |
| Delamater, George W. | 50 | Crawford | Rep | 108 | 1889-90 |
| Delp, Daniel S. | 28 | York (Part) | Rep | 179-80 | 1995-96 |
| Delp, Daniel S. | 28 | York (Part) | Rep | 181-2 | 1997-98 |
| Dengler, Clyde R. | 26 | Delaware (Part) | Rep | 153-4 | 1969-70 |
| Dengler, Clyde R. | 26 | Delaware (Part) | Rep | 155-6 | 1971-72 |
| Dengler, Clyde R. | 26 | Delaware (Part) | Rep | 157-8 | 1973-74 |
| Dent, Charles W. | 16 | Lehigh (Part), Northampton (Part) | Rep | 183-4 | 1999-00 |
| Dent, Charles W. | 16 | Lehigh (Part), Northampton (Part) | Rep | 185-6 | 2001-02 |
| Dent, Charles W. | 16 | Lehigh (Part), Northampton (Part) | Rep | 187-8 | 2003-04 |
| Dent, John H. | 39 | Westmoreland | Dem | 132 | 1937-38 |
| Dent, John H. | 39 | Westmoreland | Dem | 133 | 1939-40 |
| Dent, John H. | 39 | Westmoreland | Dem | 134 | 1941-42 |
| Dent, John H. | 39 | Westmoreland | Dem | 135 | 1943-44 |
| Dent, John H. | 39 | Westmoreland | Dem | 136 | 1945-46 |
| Dent, John H. | 39 | Westmoreland | Dem | 137 | 1947-48 |
| Dent, John H. | 39 | Westmoreland | Dem | 138 | 1949-50 |
| Dent, John H. | 39 | Westmoreland | Dem | 139 | 1951-52 |
| Dent, John H. | 39 | Westmoreland | Dem | 140 | 1953-54 |
| Dent, John H. | 39 | Westmoreland | Dem | 141 | 1955-56 |
| Dent, John H. | 39 | Westmoreland | Dem | 142 | 1957-58 |
| Derk, Miles R. | 24 | Columbia, Montour, Lycoming, Sullivan | Dem | 141 | 1955-56 |
| Derk, Miles R. | 24 | Columbia, Montour, Lycoming, Sullivan | Dem | 142 | 1957-58 |
| Derrick, George W. | 36 | Bedford, Fulton, Somerset | Rep | 125 | 1923-24 |
| Derrick, George W. | 36 | Bedford, Fulton, Somerset | Rep | 126 | 1925-26 |
| Detwiler, Jones | 12 | Montgomery | Dem | 101 | 1877 |
| Detwiler, Jones | 12 | Montgomery | Dem | 102 | 1878 |
| Devlin, Charles P. | 3 | Philadelphia (Part) | Dem | 108 | 1889-90 |
| Devlin, John H. | 43 | Allegheny (Part) | Dem | 145-6 | 1961-62 |
| Devlin, John H. | 43 | Allegheny (Part) | Dem | 147-8 | 1963-64 |
| Devlin, John H. | 43 | Allegheny (Part) | Dem | 149-50 | 1965-66 |
| Devlin, John H. | 43 | Allegheny (Part) | Dem | 151-2 | 1967-68 |
| DeWalt, Arthur G. | 16 | Lehigh | Dem | 115 | 1903-04 |
| DeWalt, Arthur G. | 16 | Lehigh | Dem | 116 | 1905-06 |
| DeWalt, Arthur G. | 16 | Lehigh | Dem | 117 | 1907-08 |
| DeWalt, Arthur G. | 16 | Lehigh | Dem | 118 | 1909-10 |
| Dewart, Lewis | 9 | Northumberland, Union | Dem | 47 | 1822-23 |
| Dewart, Lewis | 9 | Northumberland, Union | Dem | 48 | 1823-24 |
| Dewart, Lewis | 9 | Northumberland, Union | Dem | 49 | 1824-25 |
| Dewart, Lewis | 9 | Northumberland, Union | Dem | 50 | 1825-26 |
| DeWitt, Asa K. | 20 | Luzerne (Part) | Dem | 119 | 1911-12 |
| DeWitt, Asa K. | 20 | Luzerne (Part) | Dem | 120 | 1913-14 |
| DeWitt, Asa K. | 20 | Luzerne (Part) | Dem | 121 | 1915-16 |
| DeWitt, Asa K. | 20 | Luzerne (Part) | Dem | 122 | 1917-18 |
| DeWitt, Asa K. | 20 | Luzerne (Part) | Dem | 123 | 1919-20 |
| DeWitt, Asa K. | 20 | Luzerne (Part) | Dem | 124 | 1921-22 |
| DeWitt, Asa K. | 20 | Luzerne (Part) | Dem | 125 | 1923-24 |
| DeWitt, Asa K. | 20 | Luzerne (Part) | Dem | 126 | 1925-26 |
| Dickerson, Joshua | 18 | Washington, Greene | Dem | 43 | 1818-19 |
| Dickerson, Joshua | 18 | Washington, Greene | Dem | 44 | 1819-20 |
| Dickerson, Joshua | 18 | Washington, Greene | Dem | 45 | 1820-21 |
| Dickerson, Joshua | 18 | Washington, Greene | Dem | 46 | 1821-22 |
| Dickerson, Joshua | 20 | Washington, Greene | Dem | 47 | 1822-23 |
| Dickerson, Joshua | 20 | Washington, Greene | Dem | 48 | 1823-24 |
| Dickey, John | 25 | Beaver, Butler | Dem | 58 | 1833-34 |
| Dickey, John | 25 | Beaver, Butler | Dem | 59 | 1834-35 |
| Dickey, John | 25 | Beaver, Butler | Dem | 60 | 1835-36 |
| Dickey, John | 25 | Beaver, Butler | Dem | 61 | 1836-37 |
| Diehm, G. Graybill | 17 | Lebanon, Lancaster (Part) | Rep | 138 | 1949-50 |
| Diehm, G. Graybill | 17 | Lebanon, Lancaster (Part) | Rep | 139 | 1951-52 |
| Diehm, G. Graybill | 17 | Lebanon, Lancaster (Part) | Rep | 140 | 1953-54 |
| Diehm, G. Graybill | 17 | Lebanon, Lancaster (Part) | Rep | 141 | 1955-56 |
| Dill, Andrew H. | 14 | Lycoming, Union, Snyder | Dem | 95 | 1871 |
| Dill, Andrew H. | 17 | Snyder, Perry, Northumberland, Union | Dem | 96 | 1872 |
| Dill, Andrew H. | 17 | Snyder, Perry, Northumberland, Union | Dem | 97 | 1873 |
| Dill, Andrew H. | 17 | Snyder, Perry, Northumberland, Union | Dem | 98 | 1874 |
| Dill, Andrew H. | 27 | Snyder, Northumberland, Union | Dem | 99 | 1875 |
| Dill, Andrew H. | 27 | Snyder, Northumberland, Union | Dem | 100 | 1876 |
| Dill, Andrew H. | 27 | Snyder, Northumberland, Union | Dem | 101 | 1877 |
| Dill, Andrew H. | 27 | Snyder, Northumberland, Union | Dem | 102 | 1878 |
| Dimeling, George M. | 34 | Clearfield, Centre | Dem | 117 | 1907-08 |
| Dimeling, George M. | 34 | Clearfield, Centre | Dem | 118 | 1909-10 |
| Dimmick, William H. | 10 | Susquehanna, Wayne, Wyoming | Dem | 69 | 1845 |
| Dimmick, William H. | 10 | Susquehanna, Wayne, Wyoming | Dem | 70 | 1846 |
| Dimmick, William H. | 10 | Susquehanna, Wayne, Wyoming | Dem | 71 | 1847 |
| Dimock, Asa | 13 | Bradford, Susquehanna | Dem | 66 | 1842 |
| Dimock, Asa | 13 | Bradford, Susquehanna | Dem | 67 | 1843 |
| Dimock, Asa | 10 | Susquehanna, Wayne, Wyoming | Dem | 68 | 1844 |
| DiSilvestro, Anthony J. | 1 | Philadelphia (Part) | Dem | 132 | 1937-38 |
| DiSilvestro, Anthony J. | 1 | Philadelphia (Part) | Dem | 133 | 1939-40 |
| DiSilvestro, Anthony J. | 1 | Philadelphia (Part) | Dem | 134 | 1941-42 |
| DiSilvestro, Anthony J. | 1 | Philadelphia (Part) | Dem | 135 | 1943-44 |
| DiSilvestro, Anthony J. | 1 | Philadelphia (Part) | Dem | 136 | 1945-46 |
| DiSilvestro, Anthony J. | 1 | Philadelphia (Part) | Dem | 137 | 1947-48 |
| DiSilvestro, Anthony J. | 1 | Philadelphia (Part) | Dem | 138 | 1949-50 |
| DiSilvestro, Anthony J. | 1 | Philadelphia (Part) | Dem | 139 | 1951-52 |
| DiSilvestro, Anthony J. | 1 | Philadelphia (Part) | Dem | 140 | 1953-54 |
| DiSilvestro, Anthony J. | 1 | Philadelphia (Part) | Dem | 141 | 1955-56 |
| DiSilvestro, Anthony J. | 1 | Philadelphia (Part) | Dem | 142 | 1957-58 |
| DiSilvestro, Anthony J. | 1 | Philadelphia (Part) | Dem | 143-4 | 1959-60 |
| DiSilvestro, Anthony J. | 1 | Philadelphia (Part) | Dem | 145-6 | 1961-62 |
| DiSilvestro, Anthony J. | 1 | Philadelphia (Part) | Dem | 147-8 | 1963-64 |
| DiSilvestro, Anthony J. | 1 | Philadelphia (Part) | Dem | 149-50 | 1965-66 |
| Doehla, Theodore H. | 42 | Allegheny (Part) | Rep | 137 | 1947-48 |
| Doehla, Theodore H. | 42 | Allegheny (Part) | Rep | 138 | 1949-50 |
| Donahue, Charles E. | 26 | Cameron, Clarion, Clinton, Elk, Forest | Rep | 123 | 1919-20 |
| Donahue, Charles E. | 26 | Cameron, Clarion, Clinton, Elk, Forest | Rep | 124 | 1921-22 |
| Donlan, Fraser P. | 22 | Lackawanna | Rep | 137 | 1947-48 |
| Donlan, Fraser P. | 22 | Lackawanna | Rep | 138 | 1949-50 |
| Donolow, Benjamin R. | 2 | Philadelphia (Part) | Dem | 141 | 1955-56 |
| Donolow, Benjamin R. | 2 | Philadelphia (Part) | Dem | 142 | 1957-58 |
| Donolow, Benjamin R. | 2 | Philadelphia (Part) | Dem | 143-4 | 1959-60 |
| Donolow, Benjamin R. | 2 | Philadelphia (Part) | Dem | 145-6 | 1961-62 |
| Donolow, Benjamin R. | 2 | Philadelphia (Part) | Dem | 147-8 | 1963-64 |
| Donolow, Benjamin R. | 2 | Philadelphia (Part) | Dem | 149-50 | 1965-66 |
| Donolow, Benjamin R. | 2 | Philadelphia (Part) | Dem | 151-2 | 1967-68 |
| Donolow, Benjamin R. | 2 | Philadelphia (Part) | Dem | 153-4 | 1969-70 |
| Donolow, Benjamin R. | 2 | Philadelphia (Part) | Dem | 155-6 | 1971-72 |
| Donovan, Cornelius M. | 1 | Philadelphia | Dem | 86 | 1862 |
| Donovan, Cornelius M. | 1 | Philadelphia | Dem | 87 | 1863 |
| Donovan, Cornelius M. | 1 | Philadelphia | Dem | 88 | 1864 |
| Donovan, Cornelius M. | 3 | Philadelphia (Part) | Dem | 89 | 1865 |
| Donovan, Cornelius M. | 3 | Philadelphia (Part) | Dem | 90 | 1866 |
| Donovan, Cornelius M. | 3 | Philadelphia (Part) | Dem | 91 | 1867 |
| Dorsey, John | | Philadelphia City, Philadelphia, Delaware | Rep | 30 | 1805-06 |
| Dorsey, John | | Philadelphia City, Philadelphia, Delaware | Rep | 31 | 1806-07 |
| Dorsey, John | | Philadelphia City, Philadelphia, Delaware | Rep | 32 | 1807-08 |
| Dorsey, John | | Philadelphia City, Philadelphia | Rep | 33 | 1808-09 |
| Doty, Ezra | | Mifflin, Huntingdon | Rep | 33 | 1808-09 |
| Doty, Ezra | | Mifflin, Huntingdon | Dem | 34 | 1809-10 |
| Doty, Ezra | | Mifflin, Huntingdon | Dem | 35 | 1810-11 |
| Doty, Ezra | | Mifflin, Huntingdon | Dem | 36 | 1811-12 |
| Dougherty, Charles F. | 5 | Philadelphia (Part) | Rep | 157-8 | 1973-74 |
| Dougherty, Charles F. | 5 | Philadelphia (Part) | Rep | 159-60 | 1975-76 |
| Dougherty, Charles F. | 5 | Philadelphia (Part) | Rep | 161-2 | 1977-78 |
| Dougherty, Charles F. | 5 | Philadelphia (Part) | Rep | 163-4 | 1979-80 |
| Drum, Augustus | 20 | Clearfield, Indiana, Cambria, Armstrong | Dem | 74 | 1850 |
| Drumheller, Jacob | 10 | Luzerne, Columbia | Dem | 53 | 1828-29 |
| Drumheller, Jacob | 10 | Luzerne, Columbia | Dem | 54 | 1829-30 |
| Drumheller, Jacob | 10 | Luzerne, Columbia | Dem | 55 | 1830-31 |
| Drumheller, Jacob | 10 | Luzerne, Columbia | Dem | 56 | 1831-32 |
| Drury, William | 21 | Luzerne (Part) | Rep | 114 | 1901-02 |
| Drury, William | 21 | Luzerne (Part) | Rep | 115 | 1903-04 |
| Duffield, William E. | 32 | Fayette, Westmoreland (Part) | Dem | 155-6 | 1971-72 |
| Duffield, William E. | 32 | Fayette (Part), Westmoreland (Part) | Dem | 157-8 | 1973-74 |
| Duffield, William E. | 32 | Fayette (Part), Westmoreland (Part) | Dem | 159-60 | 1975-76 |
| Duffield, William E. | 32 | Fayette (Part), Westmoreland (Part) | Dem | 161-2 | 1977-78 |
| Duncan, Calvin M. | 19 | Adams, Franklin | Dem | 90 | 1866 |
| Duncan, Calvin M. | 19 | Adams, Franklin | Dem | 93 | 1869 |
| Duncan, Calvin M. | 19 | Adams, Franklin | Dem | 94 | 1870 |
| Duncan, Calvin M. | 19 | Adams, Franklin | Dem | 95 | 1871 |
| Duncan, Stephen | 1 | Philadelphia City, Philadelphia | Fed | 46 | 1821-22 |
| Duncan, Stephen | 2 | Philadelphia | Fed | 47 | 1822-23 |
| Duncan, Stephen | 2 | Philadelphia | Fed | 48 | 1823-24 |
| Duncan, Stephen | 2 | Philadelphia | Fed | 49 | 1824-25 |
| Duncan, Stephen | 1 | Philadelphia City | Fed | 50 | 1825-26 |
| Duncan, Stephen | 1 | Philadelphia City | Fed | 51 | 1826-27 |
| Duncan, Stephen | 1 | Philadelphia City | Fed | 52 | 1827-28 |
| Duncan, Stephen | 1 | Philadelphia City | Dem | 53 | 1828-29 |
| Duncan, Stephen | 1 | Philadelphia City | Dem | 54 | 1829-30 |
| Dunkel, Aaron K. | 6 | Philadelphia (Part) | Rep | 99 | 1875 |
| Dunkel, Aaron K. | 6 | Philadelphia (Part) | Rep | 100 | 1876 |
| Dunkel, Aaron K. | 6 | Philadelphia (Part) | Rep | 101 | 1877 |
| Dunkel, Aaron K. | 6 | Philadelphia (Part) | Rep | 102 | 1878 |
| Dunlap, James D. | 27 | Erie | Whig | 70 | 1846 |
| Dunlap, John M. | 16 | Lancaster | Rep | 88 | 1864 |
| Dunlap, John M. | 17 | Lancaster | Rep | 89 | 1865 |
| Dunlap, John M. | 17 | Lancaster | Rep | 90 | 1866 |
| Dunlap, William B. | 46 | Beaver, Washington | Dem | 109 | 1891-92 |
| Dunlap, William B. | 46 | Beaver, Washington | Dem | 110 | 1893-94 |
| Dunlop, James | 15 | Franklin | Fed | 49 | 1824-25 |
| Dunlop, James | 15 | Franklin | Fed | 50 | 1825-26 |
| Dunlop, James | 15 | Franklin | Fed | 51 | 1826-27 |
| Durham, Israel W. | 2 | Philadelphia (Part) | Rep | 118 | 1909-10 |
| Durham, Israel W. | 6 | Philadelphia (Part) | Rep | 112 | 1897-98 |
| Dwyer, R. Budd | 50 | Crawford, Mercer, Erie (Part) | Rep | 155-6 | 1971-72 |
| Dwyer, R. Budd | 50 | Mercer, Crawford (Part), Erie (Part) | Rep | 157-8 | 1973-74 |
| Dwyer, R. Budd | 50 | Mercer, Crawford (Part), Erie (Part) | Rep | 159-60 | 1975-76 |
| Dwyer, R. Budd | 50 | Mercer, Crawford (Part), Erie (Part) | Rep | 161-2 | 1977-78 |
| Dwyer, R. Budd | 50 | Mercer, Crawford (Part), Erie (Part) | Rep | 163-4 | 1979-80 |
| Dwyer, R. Budd | 50 | Mercer, Crawford (Part), Erie (Part) | Rep | 165-6 | 1981-82 |
| Dysart, Alexander | 12 | Mifflin, Huntingdon | Dem | 41 | 1816-17 |
| Dysart, Alexander | 12 | Mifflin, Huntingdon | Dem | 42 | 1817-18 |
| Dysart, Alexander | 12 | Mifflin, Huntingdon | Dem | 43 | 1818-19 |
| Dysart, Alexander | 12 | Mifflin, Huntingdon | Dem | 44 | 1819-20 |