The Standard's average daily circulation in April was 281,187, compared with 284,030 in March. This includes 99,711 free copies distributed in April and 99,524 in March.
The paper's six-month average is 287,033, which is up 7.05% year on year.
Out of the free newspapers targeting London, City AM and London Lite achieved the highest month-on-month increases.
City AM rose 2.68% from March to 99,905 while the London Lite's circulation increased by 1.68% to 402,281.
City AM's six-month average is up 2.47% year on year to 94,565 while the London Lite's is down 0.5% to 397,733.
Lite rival Thelondonpaper's circulation hardly moved, going from 500,792 in March to 500,911 in April. Its six-month average is 494,921, up 7.15% year on year.
Metro's London circulation grew by 0.65% from March to reach 747,006, while its six-month average is up 35.77% to 745,757.
Finally, Metro's UK circulation climbed by 0.57% to 1,360,685 and its six-month average is up by 21.86% year on year to 1,358,227.