Indrechtach mac Lethlobair (died 741) was a Dal nAraide king of the Cruithne in Ulaid (Ulster).
He was the son of Lethlobar mac Echach (died 709), a previous king.
[1] He belonged to the main ruling dynasty of the Dal nAraide known as the Uí Chóelbad based in Mag Line, east of Antrim town in modern county Antrim.
The death of Dub dá Inber mac Congalaig as King of Cruithne (the title used for them at this time in the annals) is recorded in 727.
His son Tommaltach mac Indrechtaig (died 790) was a King of Dal nAraide and of all Ulaid.