ca. 900-1500 Native Americans known as the Tocobaga Indians live in small villages at the northern end of Tampa Bay.
1838 The name Pithlochascotee River appears on a map.
1859 Pittitochoscolee, a small settlement located where Port Richey is today, appears on a map.
1860s Salt is produced at Salt Springs, about one mile north of the Pithlachascotee River.
1878 The Anclote and Hopeville post offices are established.
1881 A log schoolhouse is built by the settlers in what would become Hudson.
1882 Hudson becomes a place name as the Hudson Post Office is established in the home of Isaac Washington Hudson.
1883 The Gulf Key Post Office is established. (Later names for this area were Argo and Aripeka.)
1884 Port Richey becomes a place name as Aaron McLaughlin Richey establishes a post office in his home at the mouth of the Pithlachascotee River. (The post office replaced Hopeville post office.)
1887 Pasco County is formed from the southern part of Hernando County.
1890 A commercial sponging venture is started at Bailey's Bluff.
1904-1912 A large sawmill is in operation at Fivay.
1909 Elfers becomes a place name as the Elfers Post office is established. (The area was previously known as the Baillie settlement and, apparently, Sapling Woods.)
1912-1913 The Sass Hotel, the first major structure in Port Richey, is constructed.
1913 George Sims and a partner purchase the Port Richey Company and begin a major effort to develop the area.
1915 A post office named New Port Richey is established for the southern part of Port Richey.
1916 The New Port Richey Post, a short-lived newspaper, is founded.
1918 The Port Richey Press is founded.
1921 The First State Bank and the Palms Theater open in New Port Richey.
1922 The first Chasco Fiesta is held in New Port Richey to raise funds for the Avery Library.
1922 The first high school in western Pasco County, Gulf High School, opens.
1924 New Port Richey is incorporated.
1925 Port Richey and Elfers are incorporated.
Mid-1920s The Florida Land Boom affects western Pasco County, as real estate prices rise and a short period of rapid growth takes place.
1926 The Meighan Theatre in New Port Richey opens.
1927 The Hacienda Hotel opens.
1927 Construction begins on the home of Thomas Meighan, a leading movie star who hopes to persuade other Hollywood entertainment figures to move to New Port Richey.
1931 First State Bank suspends operation, a victim of the Great Depression.
1933 Moon Lake Lodge opens. (Much of the Moon Lake Gardens and Dude Ranch is still under construction and does not begin operation until 1937.)
1947 The Chasco Fiesta is revived.
1952 Gulf State Bank opens in New Port Richey.
Mid-1960s A period of rapid, sustained population growth begins, and extends into the 21st century.
1961 A county government center for the western part of the county opens on Sunset Road in New Port Richey.
1963 WGUL, the first radio station in New Port Richey, begins broadcasting.
1965 West Pasco Hospital, the first hospital in western Pasco County, opens.
1971 Community Hospital opens in New Port Richey.
1976 Construction is completed on a new campus of Pasco-Hernando Community College in New Port Richey.
1979 The West Pasco Government Center opens on Little Road in New Port Richey.
1980 Gulf View Square Mall opens in New Port Richey.
2001 The Werner-Boyce Salt Springs State Park is dedicated.
2004 President Bush, campaigning for re-election, speaks in Sims Park in New Port Richey.
Timeline 
History of Pasco County (1943) 
 

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