John Eichelberger (born September 1, 1958) of Blair Township, Pennsylvania is an American politician and former Pennsylvania State Senator. He is a member of the Republican Party. He represented the 30th district of the Pennsylvania State Senate.

Eichelberger gained notoriety following his defeat of Senate President Pro-Tempore Robert Jubelirer in the May 2006 primary election. In 2018, he ran to represent Pennsylvania's 13th congressional district in the U.S. House, though lost his party's nomination in the primary.

Prior to his career in government, Eichelberger was the President of an insurance brokerage in Altoona, Pennsylvania. In 1995, he was elected to the Blair County Commission. He was re-elected in 1999 and 2003. During his tenure as county commissioner, he was a major critic of local Congressman Bud Shuster, focusing on Shuster's "ethical clouds" in the later years of his tenure.^[1] When Shuster resigned in February 2001, Eichelberger's name was floated as a possible successor.^[1] Instead, the Republican State Committee selected Shuster's son, Bill Shuster, to be the Republican nominee for the May 2001 special election. Bill Shuster won the committee's nomination after replacing 18 members of the Blair County, Pennsylvania Republican Committee with his own supporters.^[2]