- 1839, August 20 - Marion's Beginnings
- 1839, First Marion, Illinois Lot Sales
- 1861 John A. Logan's Union Appeal on the Marion, Illinois Square
- 1861 The Movement to Secede from the Union
- 1866, The Cholera Epidemic
- 1875, Bloody Vendetta in the News
- 1875, June 4 - Court House and Post Office Destroyed
- 1877, December 20 - Tobacco Barn Burns
- 1877, October 11 - City Prison Burns
- 1880, January 1 -Cline's Drug Store on Square Burns
- 1883, January 4 - Well added to Square for Fire Dept.
- 1896, November 19 - South East Section of Square Burns
- 1897, Gas Explosion in Mine Kills Four, Seven Wounded
- 1898, December 8 - Goodall House on North side of Square has fire
- 1899, February 2 - Many Businesses Damaged by Fire
- 1899, September 28 - Major fire at Dennison Building on North Side of Square
- 1900, William Jennings Bryan Stumps at Marion
- 1910 Theodore Roosevelt Speaks in Marion Illinois
- 1912, February 20 - Major Fire on N. Market Clears Shacks
- 1913, Annie Oakley Visited Marion
- 1916, February 10 - Major Fire on North Side of Square
- 1916, February 11 - Fire Burns NW Corner of Square
- 1916, February 12 - Fire Reignites Further Damage Reported
- 1916, January 17 - Lowe Building on N Side of Square Burns
- 1916, January 20 - Lowe Building Wall Collapses
- 1916, Marion Carnegie Library Dedication Speech
- 1918 Lynch Mob Gathers on N. Market St., Marion, Illinois
- 1921 State Basketball Champs
- 1922 Crowd Awaits Grand Jury in Marion, Illinois
- 1923, October 10 - Major Fire on East Side of Square
- 1924, First Air Mail Letter Arrives In Marion
- 1924, Marion Has a Beautiful Park
- 1925, November 11 - Fire Destroys 400 Block of N. Market St.
- 1927, April 12 - Christian Church on N. Market Badly Damaged
- 1929, July 9, Goddard Chapel Trust Fund Established
- 1930's Depression Causes Demolition of over 400 Marion, Illinois Houses
- 1930, August 4 - Hotel Destroyed on W. Main St.
- 1934, December 24 - Major Fire Damages South Side of Square
- 1935, July 9 - City Now Owns Two Fire Trucks
- 1935, June 24 - F.W. Woolworth on West Side of Square Damaged Badly
- 1935, March 22 - Amelia Earhart Visits Marion Illinois
- 1936, October 5 - Brick Pavement of Square Being Removed
- 1937, November 2 - Assistant Fire Chief Boles Resigns
- 1937, October 26 - Fire Chief Harry Cash Replaced
- 1939 Williamson County Centennial Celebration
- 1941, June 20 - Commissioner Announces Plans to Expand Fire House
- 1941, March 4 - Biggest Blaze in Marion's History
- 1941, March 4 - Many Businesses Destroyed in Goodall Hotel Blaze
- 1941, March 5 - Rebuilding Hotel Indecisive, Rubble Still Smolders
- 1941, March 6 - Hotel Walls left on Square are Pulled Down
- 1941, Photos Related to Goodall Hotel Fire Found
- 1943, August 10 - War Dept. Selects Marion Fire Dept for use in Emergency
- 1944, Free Pigs on the Public Square
- 1948, September - Harry S. Truman visits Marion, Illinois
- 1949, January 13 - Jefferson School on Boulevard Completely Destroyed
- 1950 African American Citizens Build Community Center
- 1951, June 25 - Morrison Oil Co on N. Van Buren Totally Destroyed
- 1952- Taft Visits Marion, Illinois
- 1953, December 3 - Marion Recieves New Fire Truck
- 1954, Story of Marion to be Filmed
- 1956, September 18 - Heyde Building on N. Market Badly Damaged
- 1956, September 19 - Reported Damage to Businesses from Heyde Fire
- 1956, September 27 - Follow Up Report on Heyde Fire
- 1957, June 18 - Buildings Gutted by Fire on N. Market St.
- 1957, November 2 - Fire Chief States No Authority to Fight Fires Outside City Limits
- 1960, Low-Rent Housing at Morgan Ave. and Gent's Addition
- 1960, October 3 - John F. Kennedy Campaigns In Marion, Illinois
- 1961, July 3 - Marion Fire Dept Contracts to Protect the VA Hospital
- 1963, December 17 - Major Fire on N. Market Destroys Many Businesses
- 1963, December 18 - Report on N. Market Blaze
- 1963, May 16 - Fear of Falling Walls From Cox Building Prompts Action
- 1963, May 17 - Cox Lot on Square Cleared for Safety
- 1963, May 7 - Breakdown on Marion's Worst Fire
- 1963, May 7 - South Side of Square Goes up in Blaze
- 1963, South Market Low Rent Elderly Housing Project
- 1963, Zip Code for Marion Announced
- 1964 Williamson County Quasqui-Centennial Celebration
- 1964, August 9 - Five Businesses Burned Out
- 1967, August 15 - City Council Firms Plans for New Fire Station
- 1967, May 31 - City Council Discusses New Fire Station
- 1967, October 9 - Fire Dept Anticipates Completion of New Fire Station
- 1969, Joan Crawford at Marion Pepsi-Cola Plant Opening
- 1970, July 6 - New Fire Station Hosts Open House
- 1975, Actor John Wayne Visits Marion
- 1978- Buildings Yield to Parking Needs
- 1980 Jimmy Carter visits Marion, Illinois
- 1980, Ronald and Nancy Reagan Visit Marion
- 1989 Williamson County Sesquicentennial Celebration
- 2001, Marion Gets City Flag
- Aikman's Starting a Marion Life in the 1840's
- Early Marion Baseball Teams
- Gold Fever in Marion
- Marion Indians Baseball Team 1947-48
- Marion Timeline 1954-2016
- Population of Marion, Illinois 1839-2010
- Post Depression Housing Starts in Marion, Illinois