Horace Billings Packer (October 11, 1851 – April 13, 1940) was a Republican member of the U.S. House of Representatives from Pennsylvania.
Packer studied law, and was admitted to the bar of Tioga County, Pennsylvania, in 1873 and commenced practice in Wellsboro.
District attorney of Tioga County from 1875 to 1879, Packer was then elected to the Pennsylvania State House of Representatives in 1884 and reelected in 1886.
He also served for many years as a member of the borough council, and presided over the Republican State conventions of 1893 and 1894.
He resumed the practice of law in Wellsboro, and was also engaged in the real estate, banking, and lumber businesses.