Zhang Guangfu (張光輔) (died August 24, 689) was an official and general of the Chinese dynasty Tang Dynasty, serving as chancellor during the first reign of Emperor Ruizong.

It is not known when Zhang Guangfu was born, but it is known that he was from the Tang capital Chang'an. He was said to be intelligent and good at rhetoric in his youth, and also capable as an official. He was eventually promoted to the posts of deputy minister of agriculture (司農少卿, Sinong Shaoqing) and then Wenchang Zuo Cheng (文昌左丞), one of the secretaries general of the executive bureau of government (文昌臺, Wenchang Tai). In 687, he was made Fengge Shilang (鳳閣侍郎), the deputy head of the legislative bureau of government (鳳閣, Fengge), and given the designation Tong Fengge Luantai Pinzhangshi (同鳳閣鸞臺平章事), making him a chancellor de facto. In 688, when Emperor Ruizong's uncle Li Zhen the Prince of Yue rebelled against the rule of Emperor Ruizong's powerful mother and regent Empress Dowager Wu (later known as Wu Zetian), Empress Dowager Wu commissioned Zhang to command the troops against Li Zhen, assisted by fellow chancellor Cen Changqian and Qu Chongyu (麴崇裕). Li Zhen was quickly defeated. Thereafter, Empress Dowager Wu gave him the greater chancellor designation of Tong Fengge Luantai Sanpin (同鳳閣鸞臺三品). (It was said, however, that Zhang's soldiers, without any discouragement from him, pillaged the people of Yu Prefecture (豫州, roughly modern Zhumadian, Henan), and that Zhang further demanded all kinds of supplies from the new prefect of Yu Prefecture, Di Renjie, leading to an intense argument between Zhang and Di in which Di stated that if he had the authority to do so, he would have beheaded Zhang on the spot, even if it meant his own death.)

In 689, Empress Dowager Wu made Zhang acting Nayan (納言) -- the head of the examination bureau (鸞臺, Luantai) and a post considered one for a chancellor. Later that year, she made him acting Neishi (內史) -- the head of the legislative bureau and a post also considered one for a chancellor. He was considered capable at both positions. However, his fall would come in the fall of that year. Xu Jingzhen (徐敬真), the younger brother of Xu Jingye the Duke of Ying, who had led an unsuccessful rebellion against Empress Dowager Wu in 684, had been exiled to Xiu Prefecture (繡州, roughly modern Guigang, Guangxi), but fled from the place of exile and intended to flee north to Eastern Tujue. When he went through the eastern capital Luoyang, the officials Gong Siye (弓嗣業) and Zhang Siming gave him money to use in flight. When Xu went through Ding Prefecture (定州, roughly modern Baoding, Hebei), he was captured and brought back to Luoyang for interrogation. Gong committed suicide, but both Xu and Zhang Siming, in interrogation, implicated many officials, hoping that by doing so they could ingratiate Empress Dowager Wu and her secret police officials so that they could be spared. Zhang Siming, in particular, claimed that when Zhang Guangfu was attacking Li Zhen, he secretly consulted fortunetelling books to try to see what the future might hold, and intentionally slowed to see whether Li Zhen's rebellion had any hope. As a result of Zhang Siming's claims, Zhang Guangfu was arrested and executed with Xu and Zhang Siming, and his assets were seized.

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張光輔（？ - 689年），唐朝長安（今陝西省西安市）人。少年明辯，有官吏的才幹。歷任司農少卿、文昌右丞。

687年五月初三，時任夏官侍郎（兵部侍郎）的張光輔被任命為鳳閣侍郎（中書侍郎）、同鳳閣鸞臺平章事。688年九月初一，越王李貞起兵反對武則天，左豹韜大將軍麴崇裕為中軍大總管，岑長倩為後軍大總管，領兵十萬人討伐，張光輔為諸軍節度，為同鳳閣鸞臺三品。張光輔在豫州，部下向刺史狄仁傑要錢，狄仁傑不理。張光輔大怒：「州將輕元帥邪？」狄仁傑說：「亂河南者一越王貞耳，今一貞死，萬貞生！」張光輔問他這話什麼意思，狄仁傑說：「明公總兵三十萬，所誅者止于越王貞。城中聞官軍至，逾城出降者四面成蹊，明公縱將士暴掠，殺已降以為功，流血丹野，非萬貞而何！恨不得尚方斬馬劍，加于明公之頸，雖死如歸耳！」張光輔無法反駁，回朝上奏說狄仁傑不恭順。狄仁傑被降為複州刺史。689年三月十一，張光輔守納言（侍中）。三月二十，張光輔守內史（中書令）。徐敬業的弟弟徐敬真準備逃亡突厥。得到洛州司馬弓嗣業（《舊唐書》作房嗣業）、洛陽令張嗣明的資助。徐敬真到定州被抓獲，弓嗣業聞訊，自縊而死。張嗣明、徐敬真希望多誣告一些有名望的人，期望這樣自己能免除死罪。張嗣明誣告張光輔「征討豫州時，他私下議論圖讖、天文，在朝廷和李貞間兩頭討好。」八月初四，張光輔和徐敬真、張嗣明等一起被處死，籍沒家產。