The 1945-46 Lower Ottawa Valley League champion was the Buckingham Abbots. They participated in the 1945-46 Ottawa District Senior Playoffs. They defeated the Brockville Cabadian League champion Brockville Royal Canadian Regiment 2 games to none in the first round, They defeated the St Lawrence League champion Cardinal Cardinal 2 games to none in the quarter finals. They were defeated by Central Ottawa Valley League champion Cornwall 2 games to none (4-3, 5-3).
No further information is available on teams or standings.