| Isaac Weaver Jr. | |
| Office1: | Member of the Pennsylvania House of Representatives |
| Term Start1: | 1787 |
| Term End1: | March 1, 1803 |
| Order2: | 63rd |
| Office2: | Speaker of the Pennsylvania House of Representatives |
| Term Start2: | November 5, 1800 |
| Term End2: | March 1, 1803 |
| Predecessor2: | Cadwalader Evans |
| Successor2: | Simon Snyder |
| Office3: | 6th Treasurer of Pennsylvania |
| Term Start3: | 1802 |
| Term End3: | 1807 |
| Governor3: | Thomas McKean |
| Preceded3: | Jacob Carpenter |
| Succeeded3: | William Findlay |
| Office4: | Member of the Pennsylvania Senate for the 18th district |
| Term Start4: | 1809 |
| Term End4: | 1812 |
| Preceded4: | James Stevenson |
| Succeeded4: | Abel McFarland |
| Term Start5: | 1817 |
| Term End5: | 1820 |
| Preceded5: | Abel McFarland |
| Succeeded5: | Rees Bowen Hill |
| Birth Date: | March 1, 1756 |
| Death Date: | May 2, 1830 |
| Death Place: | Waynesburg, Pennsylvania |
| Spouse: | Abigail Price |
| Profession: | Schoolmaster |
| Party: | Democratic-Republican Party |
Isaac Weaver Jr. (March 1, 1756 – May 2, 1830) was an American politician from Pennsylvania who served as a Democratic-Republican member of the Pennsylvania House of Representatives 1797 to 1803, including as Speaker from 1800 to 1803.[1] He resigned as Speaker on March 1, 1803, to take the office of Pennsylvania Treasurer, at that time an office elected by the General Assembly.
He served as a member of the Pennsylvania Senate for the 18th district from 1809 to 1812 and again from 1817 to 1820 as Speaker of the Senate.[2]
He was born in Providence Township, Pennsylvania, on March 1, 1756, to Isaac and Sarah Dell Weaver. He received his education in Philadelphia, Pennsylvania and became a schoolmaster.
He served as a captain in the Chester County Militia during the American Revolutionary War. After the war, he married Abigail Price and together they had eleven children.[3] He moved to Waynesburg, Pennsylvania. His first wife Abigail died in 1813 and he was remarried to Rachel Husbands.[2]
He died in Waynesburg, Pennsylvania, on May 2, 1830, and was originally interred at the family farm near Castle Run in Greene County, Pennsylvania. His remains were later exhumed and reinterred at the Jefferson Cemetery in Jefferson, Pennsylvania.[3]
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