* 1798 – French troops land in Kilcummin harbour, County Mayo, Ireland to aid Wolfe Tone's United Irishmen's Irish Rebellion.

Achill Island () in County Mayo is the largest island off the coast of Ireland, and is situated off the west coast.

Category: Islands of County Mayo

Category: Gaeltacht places in County Mayo

* 1879 – The Virgin Mary, along with St. Joseph and St. John the Evangelist, reportedly appears at Knock Shrine in Knock, County Mayo, Ireland.

On 23 December 1915, Fleming married a trained nurse, Sarah Marion McElroy of Killala, County Mayo, Ireland.

* Bangor Erris, County Mayo, Republic of Ireland

County Mayo () is a county in Ireland.

Mayo County Council is the local authority for the county.

* The north-west areas of County Mayo have some of the best renewable energy resources in Europe, if not the world, in terms of wind resources, ocean wave, tidal and hydroelectric resources.

Map of County Mayo depicting its nine baronies

* Burrishoole ( west Mayo containing Achill, Mulranny and Newport, County Mayo )

Creator of the Argentine Navy ( Armada de la República Argentina, ARA ) and leader of the Argentine Armed Forces in the wars against Brazil and Spain, he was born in Foxford, County Mayo on June 22, 1777 and died in Buenos Aires in 1857.

In 1556 King ’ s County and Queen ’ s County were created and the Kingdom of Connacht was broken up into the counties of Galway, Mayo and Sligo, while Leitrim was separated from Roscommon in 1565.

He appears in folklore as a trickster, and in County Mayo thunderstorms were referred to as battles between Lugh and Balor, so he is sometimes considered a storm god: Alexei Kondratiev notes his epithet lonnbeimnech (" fierce striker ") and concludes that " if his name has any relation to ' light ' it more properly means ' lightning-flash ' ( as in Breton luc ' h and Cornish lughes )".

* Mullet Peninsula, or " The Mullet ", in the barony of Erris, County Mayo, Ireland

* County Mayo

* Mayo, County Mayo, a village

* Mayo, County Down, a townland in County Down, Northern Ireland

Born Mary Therese Winifred Bourke in Ballina, County Mayo, in 1944, she is the daughter of two medical doctors.

They settled on a large plantation he named China Grove in Brazoria County, Texas.

The notoriety of ape-men grew over the decade, culminating in 1958 when large footprints were found in Del Norte County, California, by bulldozer operator Gerald Crew.

Lancaster was cremated and his ashes were buried under a large oak tree in Westwood Memorial Park located in Westwood Village, Los Angeles County, California.

Intel and Hewlett-Packard have large manufacturing plants in Leixlip, County Kildare, to the west.

The only large scale engagement outside the city of Dublin occurred at Ashbourne, County Meath.

American fallout shelters in the early 1960s were sometimes funded in conjunction with funding for other federal programs, such as urban renewal projects of the Federal Housing Authority, examples being Barrington Plaza, and other development projects of Los Angeles County Civil Defense and Disaster Commissioner, Louis Lesser, and were designed for large numbers of citizens.

Rapp was able to secure a large tract of land in Pennsylvania and started his first commune, known as Harmonie or Harmony, in Butler County, Pennsylvania, where the Society existed from 1804 to 1815.

Historically, large Irish American communities have been found in Philadelphia ; Chicago ; Boston ; New York City ; Detroit ; New England ; Baltimore ; Pittsburgh ; St. Paul, Minnesota ; Buffalo ; Broome County ; Los Angeles ; and the San Francisco Bay Area.

One of the authors, who was kayaking in the Cache River National Wildlife Refuge, Monroe County, Arkansas, on 11 February 2004, reported on a website the sighting of an unusually large red-crested woodpecker.

In 1650 he patented a large tract of land in Washington Parish, Westmoreland County, Virginia.

In 1831, the church moved to Kirtland, Ohio where missionaries had made a large number of converts and Smith began establishing an outpost in Jackson County, Missouri, where he planned to eventually build the city of Zion ( or the New Jerusalem ).

* 1850 – The Bloody Island Massacre takes place in Lake County, California, in which a large number of Pomo Indians in Lake County are slaughtered by a regiment of the United States Cavalry, led by Nathaniel Lyon.

; Alishan oolong, Ālǐshān chá ( 阿里山茶 ): Grown in the Alishan area of Chiayi County, this tea has large rolled leaves that have a purple-green appearance when dry.

Elsewhere, ethnic Poles constitute large minorities in Lithuania, Belarus, and Ukraine: Polish is the most widely used minority language in Lithuania's Vilnius County ( 26 % of the population, according to the 2001 census results ) and is found elsewhere in southeastern Lithuania ; in Ukraine it is most common in the Lviv and Lutsk regions, while in Western Belarus it is used by the significant Polish minority especially in the Brest and Grodno regions and in areas along the Lithuanian border.

Following the battle of Tinchebray in 1106, Henry confiscated the County of Mortain from William, the Count of Mortain, and the Honour of Eye, a large lordship previously owned by Robert Malet.

* April – The Johnson County War breaks out between small farmers and large ranchers in Wyoming.

Tubman had been hired out to Dr. Anthony Thompson, who owned a large plantation in an area called Poplar Neck in neighboring Caroline County ; it is likely her brothers labored for Thompson as well.

During the Christmas and Easter seasons, the Lewiston Jaycees have two large lighted displays on the Lewiston Hill ( technically, the Washington side, and specifically, in Whitman County, above Clarkston in Washington state ), visible from nearly everywhere in the valley.

Boies owns a home in Westchester County, New York, a vineyard in Northern California, an oceangoing yacht, and a large wine collection.

The College also serves as a Los Angeles County large animal emergency evacuation center.

Montgomery County is the third largest biotechnology cluster in the USA, holding the principal cluster and companies of large corporate size in the state.

A similar situation occurred in the U. S. when NASA acquired land to construct the John C. Stennis Space Center ( SSC ), a rocket testing facility, in Hancock County, Mississippi ( on the Mississippi side of the Mississippi River, which is the Mississippi-Louisiana state line ) required NASA to acquire a large ( approximately ) buffer zone because of the loud noise and potential dangers associated with testing such rockets.

Due to this bird's ability to ( rarely ) prey upon small lambs, the gun clubs of Cork County have killed a large number of these birds in modern times.