In the 1918 electoral redistribution, the
North Island gained a further three electorates from the
South Island due to faster population growth. Only two existing electorates were unaltered, five electorates were abolished, two former electorate were re-established, and three electorates, including Rotorua, were created for the first time. The initial electorate, which was formed through the 1918 electoral redistribution, had a long coastline along the
Bay of Plenty, and incorporated, beside Rotorua, the towns and villages of
Whakatāne,
Taupō,
Tokoroa,
Putāruru,
Mangakino,
Edgecumbe,
Tāneatua, and
Murupara. In the 1922 electoral redistribution, the electorate lost some area to the electorate, and a larger area to the electorate. The 1927 electoral redistribution saw Rotorua become landlocked, with the electorate taking the coastline including Tāneatua and Edgecumbe, and Whakatāne going to the Bay of Plenty electorate. The electorate moved south and took in
Lake Taupō, with
Tūrangi just beyond the southern boundary located in the electorate. The electorate also grew in the north-west, gaining the town of
Matamata. In the 1937 electoral redistribution, the electorate shifted further south again. Matamata was lost again, and the peaks of
Tongariro,
Ngauruhoe, and
Ruapehu now formed the boundary to the Waimarino electorate. The 1946 electoral redistribution saw the Rotorua electorate abolished, with the Bay of Plenty electorate moving west and incorporating the town of Rotorua, most of the southern area going to the Waimarino electorate including the town of Taupō, and some area in the north-west going to the Waikato electorate including Tokoroa. The
First Labour Government was defeated in the and the incoming
National Government changed the Electoral Act, with the electoral quota once again based on total population as opposed to qualified electors, and the tolerance was increased to 7.5% of the electoral quota. There was no adjustments in the number of electorates between the
South and
North Islands, but the law changes resulted in boundary adjustments to almost every electorate through the 1952 electoral redistribution; only five electorates were unaltered. Five electorates were reconstituted (including Rotorua) and one was newly created, and a corresponding six electorates were abolished; all of these in the North Island. These changes took effect with the . The electorate was again landlocked and much smaller than prior to its abolition. Significant settlements included Rotorua, Tokoroa, Taupō, and Mangakino, with Lake Taupō forming the southern boundary. The current Rotorua electorate is positioned in the
Bay of Plenty region in the central North Island. It is dominated by the town of
Rotorua, and also contains the Eastern Bay of Plenty towns of
Kawerau,
Murupara and
Galatea, the last two of which are located on the outskirts of
Te Urewera National Park. In 2008, its boundaries were extended to the geographical bay, with the addition of coastline stretching from a cluster of rural towns including Pukehina and
Maketu to the outskirts of
Te Puke. In the 2025 boundary review, the electorate expanded northward to the outskirts of
Tauranga with the
Tauranga Eastern Link forming part of the northern boundary. Initial proposals saw the rural towns of the
Kaimai Range added to the electorate, though this was reverted after public consultation. == Demographics ==