Ratoath is a town in the barony of the same name in County Meath, Ireland. The town is centred on the point where the R125 and R155 regional roads meet. In the 1996 census, the population was recorded as 1,061. In the 2006 census, it was 7,249. By 2011 the population reached 9,043. The Broad Meadow River flows through the town.
Ratoath is a commuter town with most of its adult population commuting to Dublin to work. More than three quarters of the population traveled to work by car. In 2011 10.9% of the workforce was unemployed compared to the national average of 19%. This may be due to the small percentage of the Ratoath workers employed in the construction sector, with Ratoath having more people than average from higher socio-economic classes. Social class A, employers and managers constitute 717 of the 2,751 households.
Ratoath gives its name to a village, a townland, a parish, an electoral division and to a barony. The derivation or meaning of the word is uncertain. Two alternative Irish forms are cited: Ráth-Tógh and Ráth-Tábhachta. These placenames occur in Irish manuscripts and scholars say that the writers were referring to Ratoath. Evidently they were trying to give a phonetic rendering of a name that was unfamiliar to them. Mruigtuaithe occurs in the Book of Armagh as the name of one of these places in Meath where Saint Patrick founded a church and Eoin MacNeill identifies it as Ratoath. If this is correct it would seem that the second portion of the word comes from the Irish word tuath which means a territory belonging to a family or sept. Mruig means a grazing plain. Ráth is the Irish for a ringfort.