The 2nd Yeltsovka (Russian: 2-я Ельцовка) is a small river in Novosibirsk Oblast, Russia, right tributary of the Ob.

Its length is 14 km (8.7 mi), with a drainage basin of 42 square kilometres.

The 2nd Yeltsovka flows out of a small lake at the village of Klyukvenny, runs southwest through Novosibirsky District, then Kalininsky and Zayeltsovsky districts of Novosibirsk, flows into the Ob.