Moygoish (Irish: Uí Mhac gCuais)[1] is a barony in north County Westmeath, in Ireland, formed by 1672.

[2] It is bordered by County Longford to the west and four other Westmeath baronies: Corkaree (to the east), Fore (to the north–east), Moyashel and Magheradernon (to the south–east) and Rathconrath to the south–west.

Lough Derravaragh is shared with the baronies of Corkaree and Fore and is home to the Irish legend of the Children of Lir.

The N4, a national primary road passes through the village of Rathowen, connecting Dublin with the northwest of Ireland and the coastal town of Sligo.

The Royal Canal passes through the village of Ballynacargy connecting the River Liffey in Dublin to Longford town.