The College Place population increased from just over 1,800 people in 1916 to over 5,400 in 1979. That's a rapid increase, and Cross notes that it represents both progress and problems. Despite the rapid growth, the city is not ready for the number of new homes that will come online. The area also needs bus transportation for seniors and needs to make more room for new development. That's why there are several proposed improvements to the city's infrastructure that will help the city stay as it is.
The USPS reports that the population of College Place is estimated to reach 20,000 by the year 2020. The city has a single post office, at a street address of 820 E. Main Street, at a population of 2,689 people. The USPS uses the "default" name when designing ZIP codes for cities. The current median age for the College Place population is 35. The most common racial group living in the city is white. Other racial groups include Hispanic and Two Or More.