According to http://www.charlesives.org this is a complete list of Ives' songs for voice and piano:

Abide with Me
Aeschylus and Sophocles (see also Songs with Orchestra or Chamber Ensemble)
Afterglow
Allegro
The All-Enduring
Amphion
Ann Street
At Parting
At Sea
At the River
August
Autumn
Ballad from Rosamunde (see Rosamunde 1st setting)
Because of You
Because Thou Art
Berceuse
The Cage
The Camp Meeting
Canon (1st setting)
Canon (2nd setting)
Chanson de Florian
Charlie Rutlage (see also Songs with Orchestra or Chamber Ensemble)
The Children's Hour
Christmas Carol ("Come Away to the Manger")
A Christmas Carol ("Little Star of Bethlehem")
The Circus Band
The Collection
Country Celestial
Cradle Song
December
Disclosure
Down East
Dreams
Du alte Mutter / The Old Mother (see The Old Mother)
Du alte Mutter / My dear old mother
Du bist wie eine Blume
Duty (see Two Slants)
Ein Ton / I hear a tone
An Election (see Nov. 2, 1920)
Élégie
The Ending Year
Evening
(see also Songs with Orchestra or Chamber Ensemble)
Evidence
Eyes so Dark (see Weil' auf mir)
Far from my Heav'nly Home
Far in the wood
A Farewell to Land
La Fede
Feldeinsamkeit / In Summer Fields
Flag Song
Forward into Light (from The Celestial Country)
Friendship
Frühlingslied
General William Booth Enters into Heaven (see also Songs with Orchestra or Chamber Ensemble)
Give Me Jesus (see In the Mornin')
God Bless and Keep Thee
Grace
Grantchester
The Greatest Man
Gruss
Harpalus
He Is There!
Hear My Prayer, O Lord (see Song-For Anything)A
Her Eyes
Her Gown Was of Vermilion Silk
His Exaltation
The Housatonic at Stockbridge
Hymn
Hymn of Trust
I hear a tone (see Ein Ton)
I Knew and Loved a Maid
I travelled among unknown men
Ich Grolle Nicht / I'll Not Complain
I'll not complain (see Ich Grolle Nicht)
Ilmenau / Over All the Treetops
Immortality
In April-tide
In Autumn
In Flanders Fields
In My Beloved's Eyes
In Summer Fields (see Feldeinsamkeit)
In the Alley
In the Mornin'
The "Incantation" (see also Songs with Orchestra or Chamber Ensemble)
The Indians
The Innate
It Strikes Me That (see Nov. 2, 1920)
Kären (Little Kären)
La Fede (see Fede, La)
The Last Reader
The Light That Is Felt
Like a Sick Eagle
Lincoln, the Great Commoner
Die Lotosblume (see The South Wind)
The Love Song of Har Dyal
Luck and Work
Majority
Maple Leaves
Marie (1st setting)
Marie (2nd setting)
Memories: a. Very Pleasant; b. Rather Sad
Minnelied
Mirage
Mists (see also Songs with Orchestra or Chamber Ensemble)
My dear old mother (see Du alte Mutter)
My Lou Jennine
My Native Land (1st setting)
My Native Land (2nd setting)
Nature's Way
Naught that Country Needeth (from The Celestial Country)
The New River
Night of Frost in May
A Night Song
A Night Thought
No More
Nov. 2, 1920 (An Election/"It strikes me that")
An Old Flame
Old Home Day
The Old Mother
An Old Song Deranged (see Songs My Mother Taught Me, also Songs with Orchestra or Chamber Ensemble)
Omens and Oracles
On Judges' Walk
On the Antipodes (2pf)
On the Counter
"1, 2, 3"
The One Way
The Only Son
Over All the Treetops (see Ilmenau)
Paracelsus
Peaks
A Perfect Day
Pictures
Premonitions
Qu'il m'irait Bien
The Rainbow (So May It Be!) (see also Songs with Orchestra or Chamber Ensemble)

Religion
Remembrance (see also Songs with Orchestra or CHamber Ensemble)
Requiem
Resolution
Rock of Ages
Romanzo (di Central Park)
Rosamunde (1st setting)
Rosamunde (2nd setting)
Rosenzweige
Rough Wind
A Scotch Lullaby
A Sea Dirge
The Sea of Sleep
The See'r
Sehnsucht
September
Serenity
The Side Show
Slow March
Slugging a Vampire
So May It Be! (see The Rainbow)
Soliloquy
A Son of a Gambolier
Song
A Song-For Anything
Song for Harvest Season (see also Songs with Orchestra or Chamber Ensemble)
The Song of the Dead
Song without words [I]
Song without words [II]
Songs my mother taught me
The South Wind / Die Lotosblume
Spring Song
Sunrise (see Songs with Orchestra or Chamber Ensemble)
Swimmers
Tarrant Moss
There is a certain garden
There is a lane
They Are There!
The Things our Fathers Loved
Thoreau
Those Evening Bells
Through Night and Day
To Edith
Tolerance
Tom Sails Away
Two Little Flowers
Two Slants (Christian and Pagan): a. Duty; b. Vita
Vita (see Two Slants)
Vote for Names! Names! Names!
Vote for Names (3pf)
The Waiting Soul
Walking
Walt Whitman
Waltz
Watchman!
Weil' auf mir / Eyes so dark
West London
When stars are in the quiet skies
When the waves softly sigh (see A Song-For Anything)
Where the eagle cannot see
The White Gulls
Widmung
Wiegenlied
Wie Melodien zieht es mir
William Will
The World's Highway
The World's Wanderer
Yale, Farewell! (see A Song-For Anything)
Yellow Leaves