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| Ideal Sunday School Hymns | J. L. Hall; C. A. Miles; A. Geibel; Hall Mack Co. | Hall Mack Co. | Philadelphia, Penn. | 1908 | | | 211 | |
| If I Could Visit Bethlehem | | MorningStar | | 2000 | | | 15 | |
| Immanuel Hymnal | Macmillan Co. | Macmillan Co. | New York, N.Y. | 1929 | | | 566 | |
| Immanuel's Praise | Charles M. Alexander; Fleming H. Revell Co. | Fleming H. Revell Co. | New York, N.Y. | 1914 | | | 241 | |
| Imperial songs: for Sunday schools, social meetings, Epworth leagues, revival services | Hurlbut, Jesse Lyman, 1843-1930 | Cranston & Curts | New York : Hunt & Eaton ; Cincinnati | 1894 | | | 0 |  |
| In Blossom Time | J. E. Trowbridge; Henry D. Noyes & Co. | Henry D. Noyes & Co. | Boston, Mass. | 1892 | | | 4 | |
| In Excelsis for School and Chapel | Century Co. | The Century Co. | New York | 1900 | | Has Music | 325 |  |
| In Excelsis for School and Chapel. l7th ed. | Century Co. | Century Co. | New York, N.Y. | 1924 | | | 294 | |
| In Excelsis: hymns with tunes for Christian worship | Century Co. | Century Co. | New York | 1897 | | Has Music | 1135 |  |
| In Excelsis: Hymns with Tunes for Christian Worship. 7th ed. | Century Co. | Century Co. | New York, N.Y. | 1900 | | | 22 | |
| In Floral Ways | C. A. Miles; Hall Mack Co. | Hall Mack Co. | Philadelphia, Penn. | 1914 | | | 12 | |
| In His Name | W. N. Cook; Teachers' Music Pub. Co. | Teachers' Music Pub. Co. | Hudson, N.C. | 1916 | | | 152 | |
| In Praise We Sing: Two-part treble voices (Book 1) | Joyce Barthelson | Pro Art Publications, Inc. | Westbury, L. I., New York | 1962 | | | 2 | |
| Infant Praises: a collection of sacred songs, hymns, and music, for use in the Sabbath school primary department | Jno. R. Sweney; Wm. J. Kirkpatrick; John J. Hood | John J. Hood | Philadelphia | 1887 | | Has Music | 127 |  |
| Infant Songs | W. A. Ogden; E. Pitt; W. W. Whitney | W. W. Whitney | Toledo, Oh. | 1882 | | | 42 | |
| Infant Songs | W. A. Ogden; E. Pitt; W. A. Ogden | W. A. Ogden | Bellefontain, Oh. | 1861 | | | 42 | |
| Inspirational Hymns of the Church of the Brotherhood of Jesus, Ancient Order of Melchisedek | L. M. Entwistle; Magi Pub. Co. | Magi Pub. Co. | Waldron, Ark. | 1909 | Church of the Brotherhood of Jesus | | 18 | |
| Inspirational Songs for Sunday School, Social Worship, Missionary and Evangelistic Work | N. W. Fink; J. B. Lutz; W. B. Rose; Light and Life Press | Light and Life Press | Chicago, Ill. | 1924 | Free Methodist Church of North America | | 301 | |
| Inspiring Hymns | E. O. Excell; E. O. Excell Co. | E. O. Excell Co. | Chicago, Ill. | 1914 | | | 348 | |
| Inspiring Hymns | Alfred B. Smith | Singspiration Sacred Music Publishers | Grand Rapids, Michigan | 1951 | | | 175 | |
| Institute Hymns and Songs | Howard Hare; Methodist Book Concern | Methodist Book Concern | New York, N.Y. | 1925 | Methodist hymnals (general) | | 53 | |
| Institute Songs; Selections from The Chapel Hymnal | T. B. Noss; State Normal School | State Normal School | California, Penn. | 1902 | | | 20 | |
| Inter-Church Hymnal | Frank A. Morgan; Katharine Howard Ward; Biglow & Main Co. | Biglow & Main Co. | Chicago, Ill. | 1930 | | | 431 | |
| International Gospel Hymns and Songs | P. P. Bilhorn; Bilhorn Bros. | Bilhorn Bros. | Chicago, Ill. | 1905 | | | 171 | |
| International Praise: for the Sunday school and church | E. O. Excell; E. O. Excell Co. | E. O. Excell | Chicago | 1902 | | Has Music | 310 |  |
| International Singing Annual for Sabbath Schools | Philip Phillips; A. S. Barnes & Co. | A. S. Barnes & Co. | New York, N.Y. | 1874 | | | 82 | |
| International Song Service: with Bright Gems from fifty authors, for Sunday-schools, gospel meetings, missionary and young people's societies, prayer-meetings, etc. | Philip Phillips; Mast, Crowell & Kirkpatrick | Mast, Crowell & Kirkpatrick | New York | 1895 | | Has Music | 301 |  |
| International Songbook | Doreen Helen Klassen | Mennonite World Conference | Carol Stream, IL | 1990 | | | 0 | |
| Introits: or Ante-Communion Psalms for the Sundays and Holy Days Throughout the Year | John Henry Alexander; Lindsay & Blakiston | Lindsay & Blakiston | Philadelphia | 1844 | Protestant Episcopal Church | | 88 |  |
| Isles of Shoals Hymn Book and Candle Light Service | Isles of Shoals Association | The Isles of Shoals Association | New Hampshire | 1908 | Unitarian churches | Has Music | 219 |  |