Elevated sound pressure levels can lead to sleep disturbance, annoyance, hearing impairment, speech interference, and severe stress on the auditory and nervous systems if sound levels are continuous and greater than international standard limits. The aim of this study was to evaluate the noise level distributions in Lagos, Nigeria. We selected 32 locations across the Lagos metropolis for this study. A digital sound meter capable of measuring 32 dB–130 dB was used. At each location, minimum and maximum noise levels were determined. Measurements were taken in morning (8–10 a.m.), afternoon (2–4 p.m.), and evening (6–8 p.m.) periods. The obtained values were presented as mean ± standard deviation in decibels (dB). The highest average sound pressure level was found to be 90.3 ± 15.3 dB, while the lowest value was 55.30 ± 4.6 dB. There was no statistical significant difference in the noise level distributions in the three monitoring sessions (p = .74). Noise level distributions in the city exceeded the acceptable standard limits set by the World Health Organization. Health effects related to incessant exposures to high noise levels are likely to be common and may result in negative impacts on the well-being of the inhabitants of the city.