Harrow Borough have rejected the chance to join the Football Conference, now known as the National League, twice due to financial reasons.

After the end of the war, the club finally made its rightful position at the top level of the Spartan League.

Coming close to liquidation, Harrow Town was forced to sell their second pitch at Earlsmead to the council to try and survive.

Harrow also had its furthest ever run in the FA Trophy reaching the semi-finals only to lose in the second leg to the eventual winners Telford United.

The same year saw Harrow have its greatest ever FA Cup run, reaching the 2nd round proper before being knocked out by Newport County, who were then in Division Three (now League One).

During this period the importance place on ensuring the long term security of the club led to them turning down the financially risky promotion to the Football Conference twice.

1985 saw manager Micky Tomkys retire and a steady decline in the club's fortunes followed, having finished fifth and sixth in the following seasons.

Since the turn of the century, the club have failed to match earlier league successes and have gone on a slow decline, finding themselves often drawn into relegation battles.

In 2003 David Howell was appointed as the new manager and the performances improved immediately; in 2004 Boro lost on penalties in a play-off which would have seen them join the Conference South, the sixth tier of English football.

After being knocked out of the FA Cup in November, Harrow Borough sparked an unbeaten run into January before losing to Folkestone Invicta.

[3] Borough managed to end the 2010–11 season strongly despite losing Troy Hewitt and finished on a good run of form.

A 1–1 draw on the final day of the season against Cray Wanderers was enough to secure a play-off spot away to Tonbridge Angels.

In June 2011, long serving manager David Howell left Borough, along with assistant Ken Charlery, to join St Albans City.

[5] On 25 January 2015, Harrow confirmed the appointment of Steve Baker as the club's new manager, arriving from Isthmian League Division One South side Chipstead having beaten off competition from Kevin Gallen and Rufus Brevett for the job.

The 2016–17 season started positively with Harrow Borough reaching the first round proper of the FA Cup for the first time in five years.

A quill pen refers to Pinner and the famous authors who have lived there and finally, a small cluster of trees reflect Harrow Weald and the mound on Harrow-on-the-Hill.

The motto reads as "Salus Populi Suprema Lex" which translates from Latin as "The well-being of the people is the highest law".

Harrow Borough wear a slightly modified version of this badge on their playing kit, using a simple red and white colour scheme but the same pictures and symbols can be found as in the logo.

Wealdstone are considered to be Harrow Borough's main, long-standing rivals due to the geographical proximity between the two clubs.

The last match played in the "Harrow derby" was a 3–0 home victory for Wealdstone in the Isthmian League Premier Division in the 2013–14 season.