Helmstan was a medieval Bishop of Winchester. He was consecrated between 838 and 839. He died between 844 and 852 or in 853.^[1]

• Fryde, E. B.; Greenway, D. E.; Porter, S.; Roy, I. (1996). Handbook of British Chronology (Third revised ed.). Cambridge: Cambridge University Press. ISBN 0-521-56350-X.

• Helmstan 1 at Prosopography of Anglo-Saxon England

v t e Bishops of Winchester
Early Medieval 634–1006	Birinus, Bishop of Dorchester Agilbert, Bishop of Dorchester Wine Leuthere Hædde Daniel Hunfrith Cyneheard Æthelheard Ecgbald Dudd Cyneberht Ealhmund Wigthegn Herefrith (disputed) Eadmund (disputed) Eadhun Helmstan Swithun Ealhferth Tunbeorht Denewulf Frithestan Beornstan/Byrnstan Ælfheah I Ælfsige I Beorhthelm Æthelwold I Ælfheah II	Arms of the Bishop of Winchester
High Medieval 1006–1304	Cenwulf Æthelwold II Ælfsige II Ælfwine Stigand Walkelin William Giffard Henry of Blois Richard of Ilchester Godfrey de Luci Richard Poore Peter des Roches Ralph Neville William de Raley Aymer de Valence Andrew of London William de Taunton John Gervais Nicholas of Ely Robert Burnell Richard de la More John of Pontoise
Late Medieval 1305–1501	Henry Woodlock John Sandale Rigaud of Assier John de Stratford Adam Orleton William Edington William of Wykeham Henry Beaufort William Waynflete Peter Courtenay Thomas Langton
Early Modern 1501–1820	Richard Foxe Thomas Wolsey Stephen Gardiner John Ponet Stephen Gardiner John White Robert Horne John Watson Thomas Cooper William Wickham William Day Thomas Bilson James Montague Lancelot Andrewes Richard Neile Walter Curle Episcopacy abolished (Commonwealth) Brian Duppa George Morley Peter Mews Jonathan Trelawny Charles Trimnell Richard Willis Benjamin Hoadly John Thomas Brownlow North
Late Modern 1820–current	George Pretyman Tomline Charles Sumner Samuel Wilberforce Harold Browne Anthony Thorold Randall Davidson Herbert Ryle Edward Talbot Theodore Woods Cyril Garbett Mervyn Haigh Alwyn Williams Falkner Allison John Taylor Colin James Michael Scott-Joynt Tim Dakin Philip Mounstephen