Ulric I (also Ulrich, Odalric, or Udalrich) (died 6 March 1070) was the Margrave of Carniola and Carinthia from 1045 and Margrave of Istria from 1060. He was the son and successor of Poppo I and Hadamut.
On 31 July 1064, the Emperor Henry IV donated land in pago Histrie ... in comitatu Odalrici marchionis ("in the country of Istria ... in the county of Margrave Ulric") to prefato Odalrico marchioni ("the prefect Ulric, margrave"). Again on 5 March 1067, Henry donated land in pago Istria in marcha Odalrici marchionis ("in the country of Istria in the march of Margrave Ulric"), this time to the church Freising. Ulric was recorded as Odalricus marchio Carentinorum ("Ulric, margrave of the Carinthians") on his death.
Ulric married Sophia, daughter of Bela I of Hungary and his first wife, Ryksa or Richeza, sister of Casimir I of Poland. Alternatively, it has been suggested that she was the daughter of Bela and his second wife, Tuta von Formbach. Sophia was a sister of Ladislaus I of Hungary. Another alternateive hypothesis makes Sophia the daughter of Tuta and Peter of Hungary, but that seems highly unlikely. Sophie gave her first husband four children: