Ii Naokatsu (井伊 直勝, 1590 – August 24, 1662) was a Japanese daimyō of the Edo period who served the Tokugawa clan. He was also known as Ii Naotsugu. His childhood name was Manchiyo (万千代). Naokatsu succeeded to family headship following his father's death in 1602.

Ii Naokatsu
Hikone Castle, which Ii Naokatsu helped build
Head of Ii clan
In office 1602–1615
Preceded by	Ii Naomasa
Succeeded by	Ii Naotaka
1st Daimyō of Annaka
In office 1615–1632
Succeeded by	Ii Naoshige
Personal details
Born	1590
Died	August 24, 1662(1662-08-24) (aged 71–72) Ōmi Province
Nationality	Japanese
Parents	Ii Naomasa (father) Tobai-in (mother)
Relatives	Ii Naotaka (brother)

Under Tokugawa Ieyasu's orders, Naokatsu completed construction of Hikone Castle in 1606, and then moved there from Sawayama Castle when it was largely completed.

In 1614, as Naokatsu was ill, he sent his brother Ii Naotaka to fight in the Siege of Osaka; Naokatsu himself was assigned to Annaka Domain, where he undertook security duty in the Kantō region. After the siege of Osaka, Tokugawa Ieyasu rewarded Naokatsu's younger brother Naotaka with the Ii family headship, and allowed Naokatsu to form a branch family with holdings at the fief of Annaka in Kōzuke Province, worth 30,000 koku. Naokatsu retired in 1632, yielding headship to his son Naoshige. He died in Ōmi Province in 1662.

His descendants were moved around several times before having their holdings settle at Itoigawa, in Echigo Province.