| Year | Event in Thoreau's life | Elsewhere in the world |
| 1817 | Thoreau born in Concord, Mass. | James Madison inaugurated as fifth President of the U.S.; Jane Austin, English novelist, dies; U.S. begins construction of the Erie Canal |
| 1833 | Enters Harvard College | Davy Crockett's autobiography a bestseller; Henry Wadsworth Longfellow publishes "Outre-mer," German composer Johannes Brahms born |
| 1837 | Graduates from Harvard and begins his lifelong journal | Michigan becomes a state of the U.S.; Martin Van Buren inaugurated as eight president of the U.S.; Victoria becomes Queen of Great Britain; Samuel Morse exhibits his electric telegraph in New York. |
| 1839 | Spends two weeks in September on the Concord and Merrimack Rivers with his brother John | Edgar Allen Poe publishes "The Fall of the House of Usher,"; Charles Goodyear discovers "vulcanization" process that makes commercial use of rubber possible; Abner Doubleday lays out the first baseball field and conducts the first baseball game |
| 1845 | Thoreau moves to Walden Pond. | Texas and Florida become states of the U.S.; Edgar Allen Poe publishes "The Raven and Other Poems," Friedrich Engels publishes "The Condition of the Working Class in England"; the hydraulic crane, power loom for manufacturing carpets and cotton- and wool-combing machines are patented |
| 1846 | Arrested and spends one night in jail for refusing to pay poll taxes, and makes his first trip to the Maine woods. | U.S. acquires New Mexico after war with Mexico; Iowa becomes a state; Charles Dickens begins editing the first cheap English newspaper; famine in Ireland is caused by failure of their potato crop. |
| 1847 | Leaves Walden Pond. | Charlotte Bronte publishes "Jane Eyre," Emily Bronte publishes "Wuthering Heights," and William Thackeray publishes "Vanity Fair"; Mormons found Salt Lake City; inventors Thomas Edison and Alexander Graham Bell born; gold discoveries in California lead to first gold rush |
| 1849 | A Week on the Concord and Merrimack Rivers and "Resistance to Civil Government" published. | Zacharay Taylor inaugurated as 12th president of the U.S.; Charles Dickes publishes "David Copperfield" |
| 1853 | Travels to Maine a second time. | Franklin Pierce inaugurated as 14th presdient of the U.S.; Crimean war begins; Vaccination against smallpox is made compulsory in Britain |
| 1857 | Makes his final trip to Maine. | James Buchanan inaugurated as 15th U.S. President; Pasteur proves that fermentation is caused by living organisms; Czar Alexander II begins the emancipation of serfs in Russia. |
| 1859 | Thoreau's "A Plea for Capt. John Brown" published. | Oregon becomes a U.S. state; Charles Dickens publishes "A Tale of Two Cities"; James Whistler paints "At the Piano" |
| 1861 | Travels to Minnesota for two months. | Civil War breaks out; Kansas becomes a state in the U.S.; George Eliot publishes "Silas Marner"; popultion figures (in millions): Russia, 76; U.S., 32; Great Britain, 23; Italy, 25 | .
| 1862 | Thoreau dies of tuberculosis at the age of 44 | Emancipation Proclamation frees all slaves held in rebelling territory; Victor Hugo publishes "Les Miserables"; Lion Foucault successfully measures the speed of light. |