The village is situated in county Pest, on the left bank of the Danube, 3 km from the river. It is 7 km from Vác and 30 km from Budapest.
The name of the village refers to an old Hungarian personal name - Seud - meaning whitish, fair. The village in county Pest dates back to the age of the Árpád and first it was owned by the Gyula-Zombor family descending from chieftain Tétény under the name 'sceuden'. It was first mentioned in records in 1255, when documents mentioned Sigfrid of Sződ, the land-steward of county Fejér. In 1315 King Charles Robert donated it to the Széchy family. The parish was mentioned in the annual records of tithes as early as 1332-33. The dynamically developing village was bought by Antal Grassalkovich from the Madách family in 1736. The present-day church is situated 200-250m south of the mediaeval site of the village. The church was built by Antal Grassalkovich, the foundation stone was placed here on 4 June 1743. The walls were built from the ruins of the Benedictine abbey of Mogyoród as well as from the material of the old, demolished church. It was dedicated to Mary Magdalene on 16 April 1744. The school in the village was opened in 1968. The village had a lot of victims in World Wars I and II.
Sights include a monument of World Wars I and II, a church, a parish, baroque statues of the church, a statue of St. Urban, Szalachy mansion.