Final answer:
Juneau City comes first alphabetically among the four U.S. state capitals with the word "city" in their name.
Step-by-step explanation:
The four U.S. state capitals that have the word "city" in their name are Juneau City (Alaska), Carson City (Nevada), Salt Lake City (Utah), and Oklahoma City (Oklahoma). To determine which comes first alphabetically, we can compare the letters in each capital city name from left to right. In this case, Juneau City comes first alphabetically, followed by Carson City, Oklahoma City, and Salt Lake City.