The current U.S. Population is over 324 million according to the  US Census Bureau. The population has grown consistently over the years since 1920. In fact, the US population has soared from about 110 million or so in 1920 to 324 million today. Though the land area remains the same more than doubling of the population has put strains on resources and services. Both legal and illegal immigration has contributed to the population growth.

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US Population Growth by year:

Source: Trading Economics

Compared to the US, the population of Russia is only 143 million. Though Russia is the largest country in the world in terms of land size, the population is less than half of the U.S. The population growth rate in Russia has been negative since 2000. In 1950, the population of Russia was about just over 100 million. Since then it has not not even increased by 50%. The U.S. population in 1950 was about 150 million. From that year the population has soared by more than 100% to 324 million now. So the rate of population growth in the US is much higher than Russia.

Russian Population Growth by year:

Source: Wikipedia