This is not complete, and not completely accurate, but I think it’s fairly close on both counts.
1910s
- The Chapman of Rhymes (London: Alexander Moring, 1918)
1920s
- Brief Diversions (Cambridge: Bowes & Bowes, 1922)
- Papers from Lilliput (Cambridge: Bowes & Bowes, 1922)
- I for One (London: John Lane, The Bodley Head, 1923)
- Figures in Modern Literature (London: John Lane, The Bodley Head, 1924)
- The English Comic Characters (London: John Lane, The Bodley Head, 1925)
- George Meredith (London: Macmillan & Co., 1926)
- Essays of To-day and Yesterday (London: George Harrap & Co., 1926)
- Talking, One of a Series of Essays Entitled: These Diversions (London: Jarrolds, 1926)
- Adam in Moonshine (London: William Heinemann, 1927)
- Open House, A Book of Essays (London: William Heinemann, 1927)
- Thomas Love Peacock (London: Macmillan & Co., 1927)
- Benighted (London: William Heinemann Ltd., 1927)
- The English Novel (London: Ernest Benn, 1927)
- Apes and Angels: A Book of Essays (London: Methuen, 1928)
- Farthing Hall (with Hugh Walpole) (London: Macmillan & Co., 1929)
- English Humour (London: Longmans Green and Co., 1929)
- The Good Companions (London: William Heinemann, 1929)
- The Balconinny and Other Essays (London: Methuen, 1929)
1930s
- The Town Major of Miraucourt (London: William Heinemann, 1930)
- Angel Pavement (London: William Heinemann, 1930)
- Dangerous Corner, A Play in Three Acts (London: William Heinemann, 1932)
- Faraway (London: William Heinemann, 1932)
- Self-Selected Essays (London: William Heinemann, 1932)
- I'll Tell You Everything (with Gerald Bullett) (London: Macmillan, 1932)
- The Roundabout, A Comedy in Three Acts (London: William Heinemann, 1933)
- Wonder Hero (London: William Heinemann, 1933)
- Albert Goes Through (London: William Heinemann, 1933)
- Laburnum Grove, An Immoral Comedy in Three Acts (London: William Heinemann in association with Victor Gollancz, 1934)
- English Journey, Being a Rambling but Truthful Account of What One Man Saw and Heard and Felt and Thought During a Journey Through England During the Autumn of the Year 1933 (London: William Heinemann, 1934)
- Eden End, A Play in Three Acts (London: William Heinemann, 1934)
- Duet in Floodlight (1935)
- Cornelius, A Business Affair in Three Transactions (London: William Heinemann, 1935)
- The Good Companions, A Play in Two Acts (with Edward Knoblock) (London: William Heinemann, 1935)
- Three Plays and a Preface (London: William Heinemann, 1935)
- Spring Tide (as Peter Goldsmith, with George Billam) (1936)
- Charles Dickens (London: Thomas Nelson, 1936)
- Bees on the Boat Deck, A Comedy in Two Acts (London: William Heinemann, 1936)
- They Walk in the City, The Lovers in the Stone Forest (London: William Heinemann, 1936)
- Time And The Conways, A Play in Three Acts (London: William Heinemann, 1937)
- Mystery of Greenfingers, A Comedy of Detection (London: Samuel French, 1937)
- I Have Been Here Before, A Play in Three Acts (London: William Heinemann, 1937)
- People at Sea, A Play in Three Acts (London: William Heinemann, 1937)
- Midnight on the Desert, A Chapter of Autobiography (London: William Heinemann, 1937)
- Two Time Plays (Time And The Conways and I Have Been Here Before plus new 7 page intro.) (London: William Heinemann, 1937)
- The Doomsday Men, An Adventure (London: William Heinemann, 1938)
- When We Are Married, A Yorkshire Farcical Comedy (London: William Heinemann, 1938)
- Johnson Over Jordan, The Play and All About It (An Essay) (London: William Heinemann, 1939)
- Rain Upon Godshill, A Further Chapter of Autobiography (London: William Heinemann, 1939)
- Let the People Sing (London: William Heinemann, 1939)
- Our Nation's Heritage (London: J. M. Dent, 1939)
1940s
- The Long Mirror (1940)
- Postscripts (London: William Heinemann, 1940)
- Out of the People (London: Collins, 1941)
- Britain At War (Harper and Brothers, 1942)
- Goodnight Children (1942)
- Black-out in Gretley, A Story of - and for - Wartime (London: William Heinemann, 1942)
- Daylight on Saturday, A Novel About an Aircraft Factory (London: William Heinemann, 1943)
- British Women Go To War (London: Collins, 1943)
- Manpower, The Story of Britain's Mobilisation for War (London: His Majesty's Stationery Office, 1943)
- Three Plays (Music At Night, The Long Mirror, They Came To A City) (London: William Heinemann, 1943)
- Desert Highway, A Play in Two Acts and an Interlude (London: William Heinemann, 1944)
- They Came to a City (London: Samuel French, 1944)
- "Letter to a Returning Serviceman" (London: Home & Van Thal, 1945)
- Three Men in New Suits (London: William Heinemann, 1945)
- Bright Day (London: William Heinemann, 1946)
- Ever Since Paradise, An Enterainment Chiefly Referring to Love and Marriage (music by Dennis Arundell) (London: Samuel French, 1946)
- The Secret Dream: An Essay on Britain, America and Russia (London: Turnstile Press, 1946)
- Russian Journey (Writers Group of the Society for Cultural Relations with the USSR, 1946)
- Jenny Villiers (London: William Heinemann, 1947)
- Scenes Of London Life - From 'Sketches by Boz' by Charles Dickens Selected and Introduced by J.B. Priestley (London: Pan, 1947)
- The Arts Under Socialism, Being a Lecture Given to the Fabian Society with a Postcript on What the Government Should Do for the Arts Here and Now (London: Turnstile Press, 1947)
- Music at Night, A Play (London: Samuel French, 1947)
- The Long Mirror, A Play in Three Acts (London: Samuel French, 1947)
- The Rose & Crown, A Play in One Act (London: Samuel French, 1947)
- An Inspector Calls, A Play in Three Acts (London: William Heinemann, 1947)
- Theatre Outlook (London: Nicholson & Watson, 1947)
- The Golden Fleece, A Comedy in Three Acts (London: Samuel French, 1948)
- The Olympians, An Opera in Three Acts (libretto; music by Arthur Bliss) (London: Novello and Co., 1948)
- The Linden Tree, A Play in Two Acts and Four Scenes (London: William Heinemann, 1948)
- Delight (London: William Heinemann, 1949)
- Home is Tomorrow, A Play in Two Acts (London: William Heinemann, 1949)
1950s
- Bright Shadow, A Play of Detection in Three Acts (London: Samuel French, 1950)
- Summer Day's Dream, A Play in Two Acts (London: Samuel French, 1950)
- Festival at Farbridge(London: William Heinemann, 1951) (Fiction)
- Dragon's Mouth, A Dramatic Quartet in Two Parts (London: William Heinemann, 1952)
- Treasure on Pelican, A Play in Three Acts (London: Evans Brothers, 1953)
- Private Rooms (1953)
- Mother's Day (1953)
- The Other Place (1953)
- The Magicians (London: William Heinemann, 1954)
- Low Notes on a High Level (London: William Heinemann, 1954)
- Journey Down a Rainbow (with Jacquetta Hawkes) (London: Heinemann/Cresset, 1955)
- All About Ourselves and Other Essays (London: William Heinemann, 1956)
- The Writer in a Changing Society (Hand and Flower Press, 1956)
- The Scandalous Affair of Mr Kettle and Mrs Moon, A Comedy in Three Acts (London: Samuel French, 1956)
- The Art of the Dramatist, A Lecture Together with Appendices and Discursive Notes (London: William Heinemann, 1957)
- Thoughts in the Wilderness (London: William Heinemann, 1957)
- The Glass Cage, A Play in Two Acts (London: Samuel French, 1958)
- Topside, or The Future of England (1958)
1960s
- Literature and Western Man (London: William Heinemann, 1960)
- William Hazlitt (1960)
- Saturn Over the Water, An Account of His Adventures in London, South America and Australia by Tim Bedford, Painter; Edited - with Some Preliminary and Concluding Remarks - by Henry Sulgrave; and Here Presented to the Reading Public (London: Heinemann, 1961)
- Charles Dickens, A Pictorial Biography (London: Thames and Hudson, 1961)
- The Thirty-First of June: A Tale of True Love, Enterprise and Progress in the Arthurian and Ad-Atomic Ages (London: Heinemann, 1961)
- Margin Released, A Writer's Reminiscences and Reflections (London: William Heinemann, 1962)
- The Shapes of Sleep, A Tropical Tale (London: William Heinemann, 1962)
- A Severed Head, A Play in Three Acts (with Iris Murdoch) (London: Chatto & Windus, 1964)
- Sir Michael & Sir George, A Tale of COSMA and DISCUS and the New Elizabethans (London: William Heinemann, 1964)
- Man and Time (London: Aldus, 1964)
- Lost Empires, Being Richard Herncastle's Account of His Life on the Variety Stage from November 1913 to August 1914 Together with a Prologue and Epilogue (London: William Heinemann, 1965)
- The Moments (London: William Heinemann, 1966)
- Salt Is Leaving (London: Pan, 1966)
- It's an Old Country (London: Heinemann, 1967)
- The World of J.B. Priestley (chosen and introduced by Donald G. MacRae) (1967)
- Out Of Town (The Image Men, Volume 1) (London: William Heinemann, 1968)
- London End (The Image Men) (London: William Heinemann, 1968)
- All England Listened, The Wartime Broadcasts (London: Chilmark, 1968)
- Trumpets Over the Sea, Being a Rambling and Egotistical Account of the London Symphony Orchestra's Engagement at Daytona Beach, Florida, in July-August 1967 (London: Heinemann, 1968)
- Charles Dickens and His World (London: Thames and Hudson, 1969)
- Essays of Five Decades (London: William Heinemann, 1969)
- The Prince of Pleasure (London: William Heinemann, 1969)
- Time and the Conways, and Other Plays (Penguin, 1969)
- When We Are Married, and Other Plays (Penguin, 1969)
1970s
- The Edwardians (London: Heinemann, 1970)
- Snoggle, A Story for Anybody Between 9 and 90 (London: Heinemann, 1971)
- Victoria's Heyday (London: William Heinemann, 1972)
- Over the Long High Wall (London: Heinemann, 1972)
- The English (London: Heinemann, 1973)
- A Visit to New Zealand (London: Heinemann, 1974)
- Outcries And Asides (London: Heinemann, 1974)
- The Carfitt Crisis (London: Heinemann, 1974) (Fiction)
- Particular Pleasures, Being a Personal Record of Some Varied Arts and Many Different Artists (London: Heinemann, 1975)
- English Humour (London: Heinemann, 1976)
- Instead Of The Trees (London: Heinemann, 1977)