ðə kˈɑːləni ʌv dˌɛmɚɹˈɑːɹɹəˌɛsɪkwˈiːboʊ wʌz kɹiːˈeɪɾᵻd ˌɔn twˈɛnti ˈeɪt ˈeɪpɹəl wˈʌn θˈaʊzənd ˈeɪthˈʌndɹɪd twˈɛlv, wˌɛn ðə bɹˈɪɾɪʃ kəmbˈaɪnd ðə kˈɑːləniz ʌv dˌɛmɚɹˈɑːɹɹə ænd ˌɛsɪkwˈiːboʊ ˌɪntʊ ðə kˈɑːləni ʌv dˌɛmɚɹˈɑːɹɹəˌɛsɪkwˈiːboʊ.
The Colony of Demerara-Essequibo was created on 28 April 1812, when the British combined the colonies of Demerara and Essequibo into the colony of Demerara-Essequibo.