The salary of a retired U.S. Army colonel varies depending on factors such as years of service, retirement pay grade, and additional benefits. On average, a retired colonel receives an annual pension that can range from approximately $50,000 to over $80,000, based on their active duty salary and years of service. This pension is calculated using a percentage of their base pay, often around 2.5% per year of service, with adjustments for cost of living. Additionally, some retired colonels may receive other benefits or part-time income. It is important to note that these figures can fluctuate based on changes in military pay scales and individual circumstances, making the actual retirement income variable but generally substantial for those with long service records.