<P> In - N - Out 's first location was opened in the Los Angeles suburb of Baldwin Park , California in 1948 by the Snyders at the southwest corner of what is now the intersection of Interstate 10 and Francisquito Avenue . The restaurant was the first drive - thru hamburger stand in California , allowing drivers to place orders via a two - way speaker system . This was a new and unique idea , since in post-World War II California , carhops were used to take orders and serve food . </P>
<P> In - N - Out 's first location was opened in the Los Angeles suburb of Baldwin Park , California in 1948 by the Snyders at the southwest corner of what is now the intersection of Interstate 10 and Francisquito Avenue . The restaurant was the first drive - thru hamburger stand in California , allowing drivers to place orders via a two - way speaker system . This was a new and unique idea , since in post-World War II California , carhops were used to take orders and serve food . </P>
where is the first in n out burger located
where is the first in n out burger located
Baldwin Park , California
Baldwin Park , California