The Maribyrnong City Council says it's "appalled" someone would steal plaques from the Footscray Memorial Garden, which was constructed in 2012.

Last week, 80 plaques were stolen from custom-made concrete plinths.

Bronze plaques paid for by families to remember their fallen soldiers have been stolen from Footscray Memorial Garden, probably to be sold as scrap metal.

"Yesterday we became aware that another 30 plaques had been stolen," a council spokesman said on Tuesday.