Sinești is a commune located in Ialomița County, Muntenia, Romania.

It is composed of six villages: Boteni, Cătrunești, Hagiești, Lilieci, Livedea, and Sinești.

It is crossed by the national road DN2, which connects Bucharest with Urziceni.

Located in Hagiești is a two-story mansion built in 1869–1874 for Alexandru Marghiloman.

Although listed as a historical monument, the Marghiloman mansion has become a ruin that serves as a shelter for the sheep herds of nearby shepherds.