John Shower (1657–1715) was a prominent English nonconformist minister.
The elder brother of Sir Bartholomew Shower, he was born at Exeter, and baptised on 18 May 1657. His father, William, a wealthy merchant, died about 1661, leaving a widow (Dorcas, daughter of John Anthony) and four sons. Shower was educated in turn at Exeter, and at Taunton under Matthew Warren. His mother moved with him to London, and he was taught by Edward Veal and at the Newington Green academy by Charles Morton.
In 1677, before he was twenty, he began to preach, on the advice of Morton and Thomas Manton Next year, in the period of the Popish Plot, a merchant's lecture was begun in the large room of a coffee-house in Exchange Alley. Four young preachers were chosen as evening lecturers, among them being Shower (with Theophilus Dorrington, Thomas Goodwin the younger and James Lambert). Shower was ordained on 24 December 1679 by five ejected ministers, headed by Richard Adams. He at once became (still retaining his lectureship) assistant to Vincent Alsop in Tothill Street, Westminster, and held this post till 1683, when Sir Samuel Barnardiston sent him abroad with two other young ministers as companions of his nephew, Samuel Barnardiston. They made the Grand Tour, visiting France, Switzerland, Italy, and the Rhine. At Amsterdam, in July 1684, they parted.
Shower remained in Holland till 1686. Returning to London, he resumed his lecture at Exchange Alley, but the pressure to which nonconformists were then subjected led him to return to Holland in the same year. He joined John Howe at Utrecht. At the end of 1687 he became evening lecturer in the English presbyterian church at Rotterdam, of which Joseph Hill was one of the pastors. He returned to London on receiving a call (19 January 1691) to succeed Daniel Williams as assistant to Howe at Silver Street. Here he was popular, and soon received a call to the pastorate of the presbyterian congregation at Curriers' Hall, London Wall, which he accepted on 8 May 1691. In this charge he remained till death, having been ‘married’ to his flock by Matthew Mead, as Edmund Calamy puts it. Twice he moved the congregation to larger meeting-houses, in Jewin Street (1692) and Old Jewry (1701), having successively as assistants Timothy Rogers (1658–1728) and Joseph Bennet.