The following is a summary of acts which authorized boundary changes for Hancock County.
- Public Acts of 1866-67, Chapter 9, changed the boundary line between Hancock and Hawkins counties so to include Hiram Herd’s Mill and tract of land in Hancock County.
- Public Acts of 1867-68, Chapter 60, changed the boundary line between Hancock and Hawkins counties so as to include Wm. Davis’ farm in Hawkins County.
- Public Acts of 1869-70, Chapter 88, Section 9, changed the boundary line between Hancock and Hawkins counties so as to include the land of John Jones in Hancock County.
- Public Acts of 1873, Chapter 14, changed the boundary line between Hancock and Hawkins counties so as to include the lands of Thomas Moneyhun, James Moneyhun, Nicholas Moneyhun and Andrew Eadens in Hawkins County.
- Public Acts of 1877, Chapter 140, altered the Hancock - Hawkins County line, by placing all of the farms of Wm. J. Davis, Robert D. Green, William D. Trent, and John Curry in Hancock County.
- Public Acts of 1879, Chapter 161, changed the county line between Hancock and Hawkins counties from land which belonged to William J. Davis’ in Hawkins County to the Hancock County line. This act was repealed by Public Acts of 1881, Chapter 6.
- Public Acts of 1879, Chapter 258, was a more complex boundary change between Hawkins and Hancock counties, involving a large section of land along Copper Ridge, but this act was repealed by Public Acts of 1881, Chapter 5.
- Public Acts of 1881, Chapter 86, altered the line between Hawkins and Hancock counties to place the lands of William Lawson, George Lawson, John Jaynes, James Nichols, S. D. Trent, William H. Bonner, and Taylor Cope in Hancock County.
- Public Acts of 1885, Chapter 64, placed the lands of Campbell Trent and Robert C. Tate in Hancock County.
- Public Acts of 1891, Chapter 154, changed the boundary line between Grainger and Hancock counties so as to include the lands of J.D. Green and William T. Greene in Hancock County.
- Public Acts of 1895, Chapter 195, altered the line between Claiborne and Hancock counties to place all the lands of John Clark, John Epperson and William Farmer in Claiborne County.
- Public Acts of 1899, Chapter 132, also altered the boundary between Claiborne and Hancock counties, placing the lands of John K. Purkey and Martha Moles in Hancock County and the land of William Myers in Claiborne County.
- Acts of 1903, Chapter 527, changed the Grainger - Hancock County line by placing the farm of John Wolf in the eighth civil district of Grainger County.
- Private Acts of 1911, Chapter 245, placed the farm of J. N. Dalton in Grainger County, out of Hancock County.
- Private Acts of 1917, Chapter 36, placed the farms of John Green, William Earls, Matilda Myers in Hancock County, out of Claiborne County. This was repealed by Private Acts of 1949, Chapter 891.
- Private Acts of 1937, Chapter 209, changed the boundary between Hawkins and Hancock counties by placing the land of J. F. Rimer, the William Vaughn heirs, J. P. River and J. N. Horton in Hawkins County.