Ulleråker Hundred, or Ulleråkers härad, was a hundred of Uppland and Uppsala County in Sweden. The area of the hundred stretches from the border of Hagunda hundred in the south-west to the Rivers and Fyrisån in the northwest and Lake Ekoln in the south-east. The area of the hundred was described by Wilhelm Tham in 1850 as consisting of mostly unforested fields with occasional swampy areas around the streams which flow into the Fyris or Lake Ekoln. The medieval Ullarakers hundare (the name later changed into Ulleråker) had its name after Ullaraker, the place of the thing, which was close to the Church of the Holy Trinity or the Castle in Uppsala. The hundred consisted of the parishes of , Börje, , Läby, and Vänge. The hundred was (1920) part of the middle court district of Uppsala County, Tiunda tingslag and Tiunda bailiwick. In the 19th and early 20th centuries it consisted of the parishes of , Börje, , Vänge, Läby, and one half of , of which the other half belonged to Bälinge Hundred. The antiquities in Ulleråker Hundred were described by the antiquarian Johan Peringskiöld in his large, illustrated work Monumenta ullerakeriensia, published in 1719. Ulleråker is also the name of a deanery in the Archdiocese of Uppsala. (en)
Ulleråkers härad var ett härad i västra Uppland. Häradet var beläget i de västra delarna av nuvarande Uppsala kommun, vilken är en del av Uppsala län. Den totala arealen mätte drygt 243 km² och befolkningen uppgick år 1910 till 5 453 invånare. (sv)