Welcome to Southport! Before you arrive, it’s a good idea to learn a few things about where you’re headed. So flatten out your map, pick up a pen and listen up.This town sits 16 miles to the south of Silver Lake, and 348 miles south of Washington, the nation’s capital.Facts and stats interest you? Want to find out roughly how many people reside in this area of Smithville Township before you head off on your day trip? At the last count, the population was 3,500.