The Right Reverend Joseph Gillespie Armstrong D.D., S.T.D.
Bishop of Pennsylvania
Church	Episcopal Church
Diocese	Pennsylvania
In office	1963–1964
Predecessor	Oliver J. Hart
Successor	Robert L. DeWitt
Previous post(s)	Suffragan Bishop of Pennsylvania (1949-1960) Coadjutor Bishop of Pennsylvania (1960-1963)
Orders
Ordination	November 1931 by Edward T. Helfenstein
Consecration	October 28, 1949 by Henry Knox Sherrill
Personal details
Born	(1901-10-15)October 15, 1901 Warren, Pennsylvania, United States
Died	April 23, 1964(1964-04-23) (aged 62) Bryn Mawr, Pennsylvania, United States
Buried	Arlington National Cemetery
Denomination	Anglican
Parents	Joseph Gillespie Armstrong and Minnie Houston
Spouse	Clara Vickers Elliot (m.1931-d.1949) Loiuse McKelvey Bray Gillespie
Alma mater	Johns Hopkins University

Joseph Gillespie Armstrong (October 15, 1901 - April 23, 1964) was an American suffragan bishop of the Episcopal Diocese of Pennsylvania from 1949 until November 7, 1960, when he was elected coadjutor. He succeeded Rt. Rev. Oliver J. Hart as Bishop of Pennsylvania when Bishop Hart retired on July 19, 1963. However Bishop Armstrong's diocesan episcopate only lasted nine months before his death.^[1]

Armstrong was born in Warren, Pennsylvania, but raised in Virginia. Johns Hopkins University in Baltimore, Maryland awarded him a B.A. in 1928; after which he graduated from General Theological Seminary in 1931.

Ordained priest in 1932, Rev. Armstrong served as rector of Severn Parish (a/k/a St. Stephens Crownsville) near Annapolis, Maryland,^[2] and of Christ Church (Georgetown, Washington, D.C.), then as chaplain in the United States Navy in World War II. After his military discharge, Rev. Armstrong served several years as rector at St. Mary's Episcopal Church in Ardmore, Pennsylvania.

On May 11, 1949 the diocesan convention elected the Rev. Armstrong as suffragan to assist Bishop Hart. The Presiding Bishop Henry Knox Sherrill assisted bishop Hart and bishop suffragan Remington of Pennsylvania in his consecration, as did bishops, Powell of Maryland and bishop suffragan Banyard of New Jersey on October 28, 1949.^[3] He was installed as Suffragan bishop of Pennsylvania on November 15, 1949. Bishop Armstrong then assisted the diocesan bishop Hart in administering the diocese for many years until Rt.Rev. Hart's retirement. On April 1, 1964, Robert L. DeWitt, suffragan bishop of Michigan, was elected as his coadjutor, and became his successor.

Bishop Armstrong died at home in Bryn Mawr, Pennsylvania, survived by his second wife and daughters. He is buried at Arlington National Cemetery.^[4]