Prose

• History of London from its Foundation by the Romans to the Accession of Queen Victoria (1838)
• The Thames and its Tributaries, or Rambles among Rivers (1840), vol 1, vol 2
• Longbeard, Lord of London, a Romance (1841), in 3 vols.; 2nd edit. (1851) in 2 vols.; 3rd edit. (1869), in 2 vols. external source
• A collection of songs and ballads relative to the London prentices and trades; and to the affairs of London generally: during the fourteenth, fifteenth, and sixteenth centuries, 1841 external source
• Memoirs of Extraordinary Popular Delusions and the Madness of Crowds (1841) Vol 1 (transcription project), [original edition?, Vol 2 (transcription project), alt vol 2, Vol 3 (start transcription)
• The Scenery and Poetry of the English Lakes, a Summer Ramble (1846) external source
• The book of English songs, 1850 external source
• History of the Mormons (1851) external source
• The collected songs of Charges Mackay, 1859 external source
• Life and Liberty in America (1859), in 1 vol, vol 1, vol 2
• The legendary and romantic ballads of Scotland, 1861 external source
• The Gouty Philosopher, or the Opinions, Whims, and Eccentricities of John Wagstaffe, Esq. (1862) external source
• Cavalier Songs and Ballads of England from 1642 to 1684 (1863) external source
• [The illustrated book of Scottish songs. From the 16th to the 19th century, 1867 external source
• Street tramways for London, 1868 external source
• Medora Leigh: a history and an autobiography, 1869 external source
• Under the Blue Sky (1871) external source
• Lost Beauties of the English Language, an Appeal to Authors,’ &c. (1874) external source
• The Gaelic and Celtic Etymology of the Languages of Western Europe (1877) external source
• Forty Years' Recollections of Life, Literature, and Public Affairs (1830–1870) (1877), vol 1, vol 2
• Luck, and what came of it: a Tale of our Times (1881), vol 1, vol 2, vol 3
• The Poetry and Humour of the Scotch Language (1882) external source
• New light on some obscure words and phrases in the works of Shakespeare and his contemporaries, 1884 external source
• The Founders of the American Republic (1885) external source
• Through the Long Day, or Memorials of a Literary Life during Half a Century (1887), in 2 vols. vol 2
• The twin soul; or, The strange experiences of Mr. Rameses. A psychological and realistic romance, 1887 vol 1, vol 2
• A Dictionary of Lowland Scotch (1888) external source

Poetry

• Ballads and lyrics, 1859 external source
  • This Collection includes the "Legends of the Isles," illustrative of the romantic scenery and history of the Hebrides, and the adjoining mainland of Scotland, originally published at Edinburgh in the year 1845; the "Ballads and Lyrical Poems," issued in the same year; three smaller volumes, published in London at intervals from 1846 to 1849, under the titles of "Voices from the Mountains," "Voices from the Crowd," and "Town Lyrics."
• The poetical works of Charles Mackay, 1876 external source

• Song of Life
• The Working Man’s Song
• Songs and Poems (1834)
• The Hope of the World (1840)
• The Salamandrine, or Love and Immortality (1842); 2nd edit. (1853); 3rd edit. (1856) external source
• Legends of the Isles and Other Poems (1845) external source
• Voices from the Crowd, and Town Lyrics (1846) external source
• Voices from the Mountain (1847); 2nd edit. (1857) external source
• Town Lyrics (1848)
• Egeria, or the Spirit of Nature (1850) external source
• Ballads and lyrical poems, 1856 external source
• The Lump of Gold (1856)
• Under Green Leaves (1857) external source
• A Man's Heart (1860)
• Studies from the Antique, and Sketches from Nature (1864)
• A Thousand and One Gems of English Poetry (1869) (transcription project)
• Interludes and Undertones, or Music at Twilight (1884) external source
• Gossamer and Snowdrift (1890) external source