Note 1: BLUE titles represent films not found in the online International Movie Database
Note 2: GREEN titles represent films for which Harris is uncredited in the online International Movie Database
| Title | Year | Full Date | Production Company | Elmer's Role | Original Work? |
| An Adventure in Hearts [ADH] (aka [CD]) | 1919 | 1919 | Famous Players-Lasky | Producer and Scenario | No |
| The Affairs of Anatol [AOA] | 1921 | August 1921 | Famous Players-Lasky | Adaptation (with H. Granville Barker) | No |
| All Soul's Eve [ASE] | 1921 | February 1921 | Famous Players-Lasky | Scenario | No |
| The Awful Truth [AWF] | 1925 | 6 April 1925 | Peninsula Studios | Presenter, Adaptation and Scenario | No |
| The Barbarian [BAR] | 1933 | May 1933 | Metro-Goldwyn-Mayer | Adaptation (with Anita Loos) | No |
| Collusion [COL] | 1921 | c1921 | Famous Players-Lasky | Story | Unknown |
| The Coming of Amos [COA] | 1925 | 6 Sept. 1925 | Cinema Corporation of America | Production editor | No |
| Court-Martial [CM] | 1928 | 12 Aug. 1928 | Columbia Pictures | Story | No |
| Cross Country Cruise [CRO] | 1934 | Jan. 1934 | Universal Pictures | Adaptation | No |
| The Desert Bride [DEB] | 1928 | 26 Mar. 1928 | Columbia Pictures | Scenario | No |
| Ducks and Drakes [D&D] | 1921 | Feb. 1921 | Realart Pictures | Supervisor, Story, and Scenario | Yes |
| The Education of Elizabeth [EOE] | 1921 | 16 Jan. 1921 | Famous Players-Lasky | Scenario | No |
| Espionage [ESP] | 1937 | 1937 | Metro-Goldwyn-Mayer | Adaptation | Yes |
| Eve's Leaves [EVL] | 1926 | 13 June 1926 | DeMille Pictures | Production editor and adaptation | No |
| Father and Son [FAS] | 1929 | [13 May or 5 June] 1929 | Columbia Pictures | Story | No |
| The Forbidden Woman [FW] (aka BRO) | 1927 | 1927 | DeMille Pictures | Story | Yes |
| Garrison's Finish [GAR] | 1923 | 7 Jan. 1923 | Jack Pickford Productions | Supervisor and Scenario | No |
| The Girl on the Stairs [GOS] | 1925 | Mar. 1925 | Peninsula Studios | Presenter, Supervisor and Adaptation | No |
| Hell's Mistress [HEL] (aka SRN) | 1932 | c1932 | Metro-Goldwyn-Mayer | Unknown | Yes |
| Help Wanted [HEW] | 1915 | 1915 | Oliver Morosco Photoplay Company | Scenario | No |
| Her Gilded Cage [HGC] | 1922 | [5] Aug. 1922 | Famous Players-Lasky | Adaptation (with Percy Heath) | No |
| Her Master's Voice [HMV] | 1936 | [Mar.] 1936 | Paramount Pictures | Unknown | No |
| Her Own Money [HOM] | 1924 | 15 Jan. 1924 | Famous Players-Lasky | Adapation and Scenario | No |
| Her Sturdy Oak [HSO] | 1921 | July 1921 | Realart Pictures | Story and Scenario | Yes |
| The Invisible Bond [INV] (aka SEE) | 1919 | 1919 | Famous Players-Lasky | Adaptation (with Mason Carnes) | No |
| Jack Straw [JAC] | 1920 | 1920 | Famous Players-Lasky | Scenario (with Olga Printzlau) | No |
| Johnny Belinda [JB] (aka IS, 1934) | 1948 | 1948 | Warner Brothers | Story | Yes |
| Let 'Em Have It [LEM] | 1935 | May 1935 | United Artists | Story (with Joseph Moncure March) | Yes |
| Looking For Trouble [LFT] (aka TRS) | 1934 | April 1934 | United Artists | Adaptation (with Leonard Praskins) | No |
| The Lottery Man [LOT] | 1919 | Oct. 1919 | Famous Players-Lasky | Adaptation and Scenario | No |
| The Love That Dares [LTD] | 1919 | May 1919 | Fox Film | Story | Yes |
| Loving Lies [LOL] | 1924 | Jan 1924 | Associated Authors | Producer (with Frank Woods, Thompson Buchanan, and Clark W. Thomas) | No |
| Made For Love [MFL] | 1926 | [9 Jan] 1926 | Cinema Corporation of America | Production editor | No |
| The March Hare [MH] (aka YYY) | 1921 | June 1921 | Realart Pictures | Story | Yes |
| The Matinee Idol [MAI] | 1928 | 14 Mar. 1928 | Columbia Pictures | Adaptation | No |
| Miss Hobbs [MIH] | 1920 | 1920 | Realart Pictures | Scenario | No |
| Mrs. Temple's Telegram [MTT] | 1920 | 1920 | Famous Players-Lasky | Scenario | No |
| Name the Woman [NTW] | 1928 | 25 May 1928 | Columbia Pictures | Adaptation | No |
| No More Women [NMW] | 1924 | 18 January 1924 | Associated Authors | Presenter (with Associated Artists), Producer and Writer | No |
| Object--Matrimony [OBJ] (aka OBA) | 1928 | 22 December 1928 | Columbia Pictures | Story | Yes |
| It Pays to Advertise [IPA] | 1919 | 1919 | Famous Players-Lasky | Scenario | No |
| Pig Boats [PIG] | 1932 | c1932 | Metro-Goldwyn-Mayer | Unknown | No |
| Poor Man's Daughter [POD] (aka HAP) | 1934 | c1934 | Paramount Productions | Unknown | Yes |
| Pretty Mrs. Smith [PMS] (aka SUS) | 1915 | April 1915 | Bosworth Inc. and Oliver Morosco Photoplay Company | Story (with Oliver Morosco) | Yes |
| Ransom [RAN] | 1928 | 30 June 1928 | Columbia Pictures | Adaptation | No |
| Red Salute [RED] | 1935 | 1935 | Realart Pictures | Adaptation (with Humphrey Pearson and Manuel Seff) | No |
| Richard the Lion-Hearted [RLH] | 1923 | 15 October 1923 | Associated Authors | Producer (with Frank E. Woods, Thompson Buchanan, and Clark W. Thomas) | No |
| Satan [SAT] | 1932 | c1932 | Metro-Goldwyn-Mayer | Unknown | Yes |
| Sham [SHA] (aka FRO) | 1921 | May 1921 | Famous Players-Lasky | Story (with Geraldine Bonner) | Yes |
| The Sins of St. Anthony [SSA] | 1920 | 1920 | Famous Players-Lasky | Producer and Scenario | No |
| The Siren [SRE] | 1927 | 20 December 1927 | Columbia Pictures | Adaptation | No |
| The Six Best Cellars [SBC] | 1920 | 1920 | Famous Players-Lasky | Scenario | No |
| Skyscraper Souls [SKY] | 1932 | August 1932 | Cosmopolitan Productions in association with Metro-Goldwyn-Mayer | Dialogue | No |
| Society Girl [SG] | 1932 | June 1932 | Fox Film | Dialogue | No |
| So Long, Letty [SLL] (aka TNW) | 1920 | 4 November 1920 | Christie Film Company | Story (with Oliver Morosco) | Yes |
| So Long, Letty [SLL] (aka TNW) | 1930 | February 1930 | Warner Brothers | Story (with Oliver Morosco) | Yes |
| So This is Love? [STI] | 1928 | 6 February 1928 | Columbia Pictures | Adaptation | No |
| The Speed Girl [SPE] | 1921 | November 1921 | Realart Pictures | Story | No |
| Spirit of Youth [SY] | 1929 | [15 or 20] February 1929 | Tiffany-Stahl Productions | Story and Continuity (with Eve Unsell) | Yes |
| The Sporting Age [SPA] | 1928 | 2 March 1928 | Columbia Pictures | Adaptation | No |
| Stepping Out [SO] (aka MER and MWH) | 1931 | 1931 | Hal Roach Studios in association with Metro-Goldwyn-Mayer | Adaptation (with Robert E. Hopkins) | Yes |
| Sunny Side Up [SUN] | 1926 | 2 August 1926 | DeMille Pictures | Supervisor and Adaptation (with Beulah Marie Dix) | No |
| Tess of the Storm Country [TSC] | 1922 | 12 November 1922 | Mary Pickford Company in association with United Artists | Adaptation | No |
| That Certain Thing [TCT] | 1928 | 1 January 1928 | Columbia Pictures | Story and Adaptation | Yes |
| The Three Wise Guys [TWG] | 1936 | May 1936 | Metro-Goldwyn-Mayer | Adaptation | No |
| Too Much Wife [TOO] | 1922 | 1 January 1922 | Realart Pictures | Supervisor | No |
| The Trial Marriage [TRI] | 1929 | April 1929 | Columbia Pictures | Unknown | Unknown |
| The Vine [VI] | 1921 | c1921 | Famous Players-Lasky | Unknown | Unknown |
| What Happened to Jones [WHJ] | 1920 | 1920 | Famous Players-Lasky | Scenario | No |
| Why Smith Left Home [WSL] | 1919 | 1919 | Famous Players-Lasky | Scenario | No |
| The Wild Olive [WO] | 1915 | June 1915 | Bosworth, Inc. and Oliver Morosco Photoplay Company | Adaptation and Scenario (with Oliver Morosco) | No |
| The Wise Virgin [WIV] | 1924 | 24 October 1924 | Peninsula Studios | Supervisor and Writer | Yes |
| A Woman's Way [WW] | 1928 | 18 February 1928 | Columbia Pictures | Adaptation | No |
| Young Sinners [YS] (aka FST, WOL, WYE, WOY) | 1931 | May 1931 | Fox Film | Story | Yes |
|
©2005 |
