Soccer is a year round sport with three seasons: spring, fall, winter (indoor). However, not every organization will offer all 3 seasons, it is on a case by case basis.
Like baseball, leagues also offer various levels of competition for varying skill levels. Most organizations will offer a beginner skill level (These go by a few names: intramural, in-house, recreational) and an advanced skill level (travel, academy, club, competitive)
Find a youth soccer league in your area using the links below: