Ziwa Ziway au Zway ni kati ya maziwa ya maji baridi ya Bonde la Ufa nchini Ethiopia. Liko kilometa 160 kusini kwa Addis Ababa, mita 1,636 au 1,846 juu ya UB. Ziwa linachangiwa na Mto Meki na Mto Katar, halafu linatokwa na mto Bulbar. Eneo lake lote ni kilometa mraba 440, urefu ni kilometa 31 na upana kilometa 20. Kina chake hakizidi mita 9. Mji wa Ziway uko pwani upande wa magharibi. Ndani yake vinapatikana visiwa vya Debre Sina, Galila, Bird Island na Tulu Gudo, ambacho kina monasteri Leslau, Wolf (1999). Zway Ethiopic Documents: Grammar and Dictionary. Wiesbaden: Otto Harrassowitz, xv. ISBN 3447041625.  "Water Resources and Irrigation Development in Ethiopia – IWMI" Archived 18 Julai 2011 at the Wayback Machine, Table 3. Basic hydrological data of lakes and reservoirs of Ethiopia. (accessed 2 July 2011) Google Earth "Climate, 2008 National Statistics (Abstract)" Archived 13 Novemba 2010 at the Wayback Machine, Table A.2. Central Statistical Agency website (accessed 26 December 2009) Robert Mepham, R. H. Hughes, and J. S. Hughes, A directory of African wetlands, (Cambridge: IUCN, UNEP and WCMC, 1992), p. 158 ILEC Database entry for Lake Zway