The current District 4 of the Nevada Senate contains parts of North Las Vegas and Las Vegas and a small section of Sunrise Manor. Furthermore, North Las Vegas Airport is situated inside the district. It has been represented by senator Kelvin Atkinson since its creation.
The fourth senatorial district was created during the reapportionment of the districts in 2011 after the 2010 Census was held. The new districts went into effect on January 1, 2012 for filing for office, and for nominating and electing senators. It became effective for all other purposes on November 7 – the day after Election Day, when the new senator terms began. The borders of District 4 are defined in the Nevada Revised Statutes using census tracts, block groups, and blocks. Two senatorial elections have been held in the district since its creation. In the 1960's, the 4th district was a multi member constituency that covered the entirety of Clark County. Since the 1970 census, it would always be based around the Las Vegas Historic West Side and southern North Las Vegas.
District 4 has a total surface area of 25 square miles (65 km2) and a perimeter of 26.6 miles (42.8 km). The district coincides with assembly districts 6 and 7. In 2010, District 4 contained almost 55,000 registered voters, which was over 40% of the total population, and over 60% of the voting age population. It was after District 2 the senatorial district with the lowest number of registered voters. Of those registered voters 65% were Democrats, and more than 15% were Republicans. Nearly 15% of the electorate was non-partisan.
District 4 had a total of 128,783 inhabitants in 2010, which was 0.14% above the ideal. It has a more diverse population than the rest of Nevada. 40% of the population is exclusively white, while over a quarter is African-American. The latter percentage is over three times the average of Nevada, and is higher than in any other district of the Nevada Senate. The district also has a large Hispanic and Latino community: over 45% of the district's inhabitants belong to one of these groups. Only District 2 has a bigger Hispanic and Latino population. Moreover, the population of District 4 is low educated. Over 30% of the adult population does not have a high school diploma, and no more than six percent has a bachelor's degree. The median household income is nearly $15,000 lower than in the rest of Nevada, and over a quarter of the population lives in poverty.