TheChoinumniwere one of the many tribes of theYokutspeople that live in theSan Joaquin ValleyofCalifornia.The Choinumni lived on theKings River.Their culture is especially well known from the account ofThomas Jefferson Mayfieldwho was raised among them, at a village, opposite the mouth of Sycamore Creek, on the south bank of the Kings River, just above, what is nowTrimmer, Californiain the 1850s until 1861. They spoke theChoynimni language.