- Apr 1 1st edition of Dutch newspaper "The People"
- Apr 2 1st edition of The Volk published (Amsterdam)
Assassination Attempt
Apr 4 Assassination attempt on Prince of Wales, later British King Edward VII when shot by Jean-Baptiste Sipido in protest over Boer war

Edward VII
Boxing Title Fight
Apr 6 James J. Jeffries KOs Jack Finnegan in 1 for heavyweight boxing title

James J. Jeffries
Event of Interest
Apr 11 The first modern submarine designed and built by John Philip Holland is purchased by the U.S. Navy

John Philip Holland
- Apr 12 The US Congress passes the Foraker Act, establishing Puerto Rico as an unincorporated territory (effective 1 May)
- Apr 14 Veteran's Hospital at Ft Miley forms
- Apr 15 Exposition Universelle (World's Fair) in Paris opens (till 12th Nov)
- Apr 15 An early 50 mile race is won by an electric car in over 2 hrs
- Apr 16 US Post Office issues 1st books of postage stamps
- Apr 16 4th Boston Marathon won by Canadian Jim Caffrey in race record 2:39:44.4
- Apr 17 7 high chiefs of American Samoa sign Instrument of Cession
- Apr 19 Highest scoring opening game, Phils beat Braves 19-17 in 10
- Apr 23 1st know occurrence of word "hillbillie" (NY Journal)
- Apr 26 Newly renamed American League opener in Cleveland draws 6,500 (still as a minor league, was Western League)
- Apr 30 The "Hawaiian Organic Act" is enacted by US Congress making Hawaii a US territory
- Apr 30 165 lb English boxer Bob Fitzsimmons KOs 305 lb American Ed Dunkhost in round 2 of a lop-sided bout in Brooklyn, New York
- Apr 30 Casey Jones dies heroically in a train wreck at Vaughn, Mississippi, while driving Cannonball Express (immortalized in"Ballad of Casey Jones")