Laois Brigade – 3 Southern Division

1 Battalion: Unit strength on 11 July 1921 was 381 all ranks, and the strength on 1 July 1922 was 168 all ranks.The companies of the 1 Battalion were located as follows: Ballyroan, Clonkeem, Heath, Lalor’s Mills, Portlaoise, Ratheniska, Raheen, Straboe, Pallas, and Mountmellick.
2 Battalion: Unit strength on 11 July 1921 was 313 all ranks, and the strength on 1 July 1922 was 184 all ranks. Between the two critical dates this battalion was reorganised and companies were formed in different locations, as given below.At the first critical date the companies of the 2 Battalion were located as follows: Clonaslee, Rosenallis, Mountmellick, Clonachadoo, and Ballyfin. At the second critical date the companies of the 2 Battalion were located as follows: Ballyfin, Pallas, Clonkeen, Raheen, Mountrath, Clonaheen, Clonard, Killenure, Castletown, Borris-in-Ossory, and Camross.
3 Battalion: Unit strength on 11 July 1921 was 373 all ranks, and the strength on 1 July 1922 was 294 all ranks. The companies of the 3 Battalion were located as follows: Abbeyleix, Ballacolla, Clough, Durrow, Shanahoe, Rathdowney, Ballinakill, Cullahill, Ballybrophy, and Clonmeen.
4 Battalion: Unit strength on 11 July 1921 was 300 all ranks, and the strength on 1 July 1922 was 192 all ranks. The companies of the 4 Battalion were located as follows: Knocklaide & Timahoe, Kilcruise, Luccacurran, Ballickmoyler, and Wolfhill.
5 Battalion: Unit strength on 11 July 1921 was 339 all ranks, and the strength on 1 July 1922 was 138 all ranks. The companies of the 5 Battalion were located as follows: Killenard, Portarlington, Courtwood, Emo, and Vicarstown.
6 Battalion: This unit existed on the first critical date only, and the strength on 11 July 1921 was 203 all ranks.The companies of the 6 Battalion were located as follows: Mountrath, Castletown, Camross, Borris-in-Ossory, Coolrain, Killenure, and Kyle.

An Active Service Unit was effective with the Laois Brigade up to 11 July 1921 with a total overall strength of 9 all ranks. Personnel were attached to the A.S.U from the battalions of the brigade.