P. s. aureoflavus is found in SE Kenya (south of the Tana River), coastal Tanzania (including Pemba and Zanzibar), eastern Malawi, and northern Mozambique. The Eastern Golden Weaver inhabits coastal plains, river floodplains and lowland river valleys.
The Eastern Golden Weaver feeds on seeds, including rice and millet, and also nectar and insects, especially termite alates. The young are fed mainly on insects. It forms large foraging flocks when not breeding. It is colonial, with small territories, and is probably polygynous. The tightly-woven nest is oval to spherical, with the entrance below. The nest material consists of grass or reed strips. The nest is lined with soft Eragrostris inflorescences, and rarely with a few feathers. The nest is attached to a single reed stem at the side, or supported by a reed on either side, sited 1-2 m above water, or is situated in trees at a much higher level. The reeds or branches above nests are often stripped of leaves. It may nest alongside other weaver species.