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.
[3] He was born in Providence Township, Pennsylvania, on March 1, 1756, to Isaac and Sarah Dell Weaver.
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.
His first wife Abigail died in 1813 and he was remarried to Rachel Husbands.